Off-Leash Dog Recreation

Sofia's social scene needs you on Monday. We're hosting a casual Sofia Expats meetup – a relaxed evening for locals and expats to meet, chat, and just enjoy good company. * Monday, 25 May * 19:00 * Edin Bar, Graf Ignatiev 24 Join the event on Facebook for updates: https://www.facebook.com/events/3061894383995653 Whether you moved here last week or you've been calling Sofia home for years, this is your chance to expand your circle a little. Come meet someone who's been through the same bureaucratic nightmare you have. Get a restaurant recommendation from a local. Or just have a fun Monday evening. We'll be somewhere central in Sofia. Exact location dropping soon – RSVP so you don't miss it. See you there! 🙋‍♀️ Coming solo? Don't worry. Maria and Liliya will be welcoming guests so you don't have to feel alone or awkward. \*\*\*\*\*\*\*\*\*\*\* [www.SofiaExpats.com](https://l.facebook.com/l.php?u=http%3A%2F%2Fwww.SofiaExpats.com%2F%3Ffbclid%3DIwZXh0bgNhZW0CMTAAYnJpZBExd3hHT2kwT0hYM1FJUVBqVHNydGMGYXBwX2lkEDIyMjAzOTE3ODgyMDA4OTIAAR4rvS_PRHmgSC7UU9UYlc-BPWM9KMuZiK56bB9rt7jEFcc0TkeZcoU4W66GwA_aem_FqS6xhLF7_vVzoLVjpptqg&h=AUCS35FfpViN9L_zstBoH9Kmyry7hnT_QM_RQnX_5ksaKMLJsnJA71iWkywvMisjH7MFCMVhwZxpki9iPopG677ADnR5MPEbBQl3AQzCUShitSjyy_c1ZZdPANmjbw60zGD7zOCSu2FrmZDIVH8&__tn__=q&c%5B0%5D=AUDP8EuZzbYxR3zlgOCMIfPqvxafb0aHHkC_-BxUbPdmnPqIrHOcUac9Tzd6NzkU1CHKRi0qGmkrJKdsn6Z51O2rr8-_rPbI2CaWLk81QOPR6wFrf8iiS8sTCs-KzIe8J2JLqkkKbjGy044mfEbxDNd9kBYNng) is your not-boring weekly newsletter for English-friendly events, activities and cultural tips. Subscribe to receive it every Monday. 📸 Keep in mind that pictures will be taken during the event for marketing purposes.

Здравейте, WordPress хора! Както знаете, благодарение на Matt Mullenweg и Mike Little, на 27 май 2003 г. един млад проект с отворен код направи първите си стъпки в света - и ето ни 23 години по-късно, все още влюбени в него. Двама души го създадоха, но хиляди доброволци, разработчици, дизайнери и ентусиасти по целия свят го превърнаха в това, което е днес. Затова на 27 май 2026 г. отново ще се съберем в София, за да вдигнем тост (и хапнем парче торта) за рождения ден на любимата ни платформа! Какво ни очаква? Среща с хора, които говорят на нашия език - този на темите, плъгините, къстъмизациите и късните нощи в WordPress редактора. Очакват ни разговори, хапване, торта и онова специално усещане, когато общността се събере на едно място. Докато ние празнуваме в София, хиляди WordPress ентусиасти по целия свят правят същото – а ние сме част от тази голяма картина. Без значение дали си разработчик с 15 години стаж, дизайнер, който прави първия си сайт, блогър, агенция или просто човек, който обича отворения код – има място за теб на тази маса. Малко повече инфо: 🎟️ Събитието е напълно безплатно. Единственото, което трябва да направите, е да се регистрирате в събитието в Meetup.com. 📍 Мястото? Добре познатото ни Sky Beauty Lab! 👕 Донеси любимият си суаг! Извади от гардероба най-готината WordPress тениска, шапката с логото, чорапите с Wapuu – каквото имаш. И не забравяй да публикуваш снимки с хаштаговете #WP23 и #WP23Sofia, за да покажем на света как празнува българската общност. Благодарности: Това парти нямаше да е възможно без партньорите ни, които стоят зад WordPress Sofia Meetup и общността ни вече години наред – [SuperHosting.BG](SuperHosting.BG), [Delta.BG](Delta.BG), [Jump.bg](Jump.bg) и [JetHost.BG](JetHost.BG). Благодарим ви, приятели! <3 Заредете доброто си настроение, отворете календара и си запазете датата. За тези, които не знаят: месечните срещи на WordPress Sofia Meetup събират десетки хора (независимо дали са професионалисти или абсолютно начинаещи), които по някакъв начин са свързани с най-използваната система за управление на съдържанието в света. Те са напълно безплатни и отворени за всички, които обичат WordPress - единственото нещо, което трябва да направите, за да присъствате, е да се регистрирате в събитията тук. Очакваме ви! Фори, Ники, Явор

**Founders Running Club** (FRC) brings founders, investors, tech, creative people and startup enthusiasts together for weekly easy runs and networking. We like to be comfortable when we run and finish with coffee and conversations. Choose your pace or follow a pacer—pets, friends, family, are welcome. 🗓️ Launched in San Francisco, July 16, 2022 🌍 Now in 35+ cities 📅 Running + Networking events + Community **Join the community** [http://foundersrc.com/chats](http://foundersrc.com/chats) **Stay updated**: Instagram [http://instagram.com/foundersrc/](http://instagram.com/foundersrc/) Podcast [http://podcast.foundersrc.com/](http://podcast.foundersrc.com/) LinkedIn [http://linkedin.com/company/foundersrc/](http://linkedin.com/company/foundersrc/) Strava [http://strava.com/clubs/foundersRC](http://strava.com/clubs/foundersRC) Website [http://foundersrc.com/](http://foundersrc.com/)

Последно за сезона издание преди лятната ваканция! ☀️ И това ако не е повод да се видим! 🙂🎉 **Python Meetup @ Sofia** 🐍 е тук през май 🌸 с интересна тема 💡 и почерпка 🍻 преди така дългоочакваните летни месеци! Ще се съберем в края на май 📅, ще споделим опит 🤓, ще се почерпим 🍹 и ще си поговорим 💬, по стара пайтънмийтъпска традиция ;) **🗓️ Датата е 26-ти май, а мястото е 📍Barter Community Hub 🏢.** **Започваме в ⏰ 19:00ч.** 🎫 Събитието е напълно безплатно ✅, нужно е само да потвърдиш присъствие тук 🙌 📢 Тема: **Async Python: The (bright) future after the end of GIL** 👨‍💻 Лектор: **Ивайло Дончев** 💭 **За какво ще си говорим:** Когато говорим за асинхронното програмиране с Python 🐍, винаги изниква една мистична абревиатура - GIL 🤔. В лекцията ще говорим за това как се промени асинхронното програмиране в python през годините 📈, какво е GIL, защо беше нужен, защо беше нужно да се премахне ❌ и какво означава това на практика ⚙️. Лекцията ще бъде на български език! 🇧🇬 🎙️ **За лектора:** Ивайло Дончев е Senior Full Stack developer 👨‍💻 и Technical Team Lead 🧠 в Waracle (България). Има 10+ години опит с Python 🐍 и Django, лектор на EuroPython 2018, 2022 и 2023 🎤 и лектор на курсовете на HackBulgaria 📚. След лекцията продължаваме в networking частта 🤝 с традиционната почерпка 🍻 от нашите партньори от **[Waracle](https://waracle.com/)** 🙏. Разбира се, ще има и томбола 🎁. А след това ще се отдадем на заслужена лятна почивка 🏖️ и ще се видим отново през септември 🍂! Както се казва, да сме живи и здрави! 🙏 Очакваме те на 26-ти май в Barter Community Hub!📍 Започваме точно в 19:00! ⏰ \-\-\- Final edition of the season before the summer break! ☀️ If that’s not a reason to get together, we don’t know what is! 🙂🎉 **Python Meetup @ Sofia** 🐍 is back this May 🌸 with a great topic 💡 and some treats 🍻 before we head into those long-awaited summer months! We’re gathering at the end of May 📅 to share knowledge 🤓, grab a drink 🍹, and catch up 💬, just like in the good old Python Meetup tradition ;) 🗓️ Date: **May 26** 📍 Location: **Barter Community Hub** 🏢 ⏰ Time: **19:00** 🎫 The event is completely free ✅ - just make sure to RSVP 🙌 📢 Topic: **Async Python: The (bright) future after the end of GIL** 🚀 👨‍💻 Speaker: **Ivaylo Donchev** **💭 What we’ll cover:** When we talk about asynchronous programming with Python, a mysterious abbreviation always comes up - GIL. 🤔 In the lecture we will talk about how asynchronous programming in Python has changed over the years 📈, what GIL is, why it was needed, why it needed to be removed❌ and what it means in practice.⚙️ The talk will be in Bulgarian 🇧🇬. 🎙️ **About the speaker:** Ivaylo Donchev is a Senior Full Stack Developer 👨‍💻 and Technical Team Lead 🧠 at Waracle (Bulgaria). He has 10+ years of experience with Python 🐍 and Django, has spoken at EuroPython (2018, 2022, 2023) 🎤, and is also a lecturer at HackBulgaria 📚. After the talk, we’ll continue with a networking session 🤝, featuring complimentary drinks 🍻 kindly provided by our partners at **[Waracle](https://waracle.com/)**[ ](https://waracle.com/)🙏. And yes… there will be a raffle 🎁! Then it’s time for a well-deserved summer break 🏖️, and we’ll be back in September 🍂. Until then - stay awesome and take care! 🙏 See you on May 26 at Barter Community Hub!📍 We start right at 19:00 ⏰

Sofia's social scene needs you on Monday. We're hosting a casual Sofia Expats meetup – a relaxed evening for locals and expats to meet, chat, and just enjoy good company. * Monday, 25 May * 19:00 * Edin Bar, Graf Ignatiev 24 Join the event on Facebook for updates: https://www.facebook.com/events/3061894383995653 Whether you moved here last week or you've been calling Sofia home for years, this is your chance to expand your circle a little. Come meet someone who's been through the same bureaucratic nightmare you have. Get a restaurant recommendation from a local. Or just have a fun Monday evening. We'll be somewhere central in Sofia. Exact location dropping soon – RSVP so you don't miss it. See you there! 🙋‍♀️ Coming solo? Don't worry. Maria and Liliya will be welcoming guests so you don't have to feel alone or awkward. \*\*\*\*\*\*\*\*\*\*\* [www.SofiaExpats.com](https://l.facebook.com/l.php?u=http%3A%2F%2Fwww.SofiaExpats.com%2F%3Ffbclid%3DIwZXh0bgNhZW0CMTAAYnJpZBExd3hHT2kwT0hYM1FJUVBqVHNydGMGYXBwX2lkEDIyMjAzOTE3ODgyMDA4OTIAAR4rvS_PRHmgSC7UU9UYlc-BPWM9KMuZiK56bB9rt7jEFcc0TkeZcoU4W66GwA_aem_FqS6xhLF7_vVzoLVjpptqg&h=AUCS35FfpViN9L_zstBoH9Kmyry7hnT_QM_RQnX_5ksaKMLJsnJA71iWkywvMisjH7MFCMVhwZxpki9iPopG677ADnR5MPEbBQl3AQzCUShitSjyy_c1ZZdPANmjbw60zGD7zOCSu2FrmZDIVH8&__tn__=q&c%5B0%5D=AUDP8EuZzbYxR3zlgOCMIfPqvxafb0aHHkC_-BxUbPdmnPqIrHOcUac9Tzd6NzkU1CHKRi0qGmkrJKdsn6Z51O2rr8-_rPbI2CaWLk81QOPR6wFrf8iiS8sTCs-KzIe8J2JLqkkKbjGy044mfEbxDNd9kBYNng) is your not-boring weekly newsletter for English-friendly events, activities and cultural tips. Subscribe to receive it every Monday. 📸 Keep in mind that pictures will be taken during the event for marketing purposes.

Combinatorial optimization problems arise across logistics, scheduling, and engineering, and C++ remains a language of choice when performance matters. This lecture takes a practical look at solving such problems in C++, using the Electric Vehicle Routing Problem as a running example. We begin with an exact solver, formulating the problem as a mixed-integer program and trying to solve it through GLPK's C API directly from C++. Exact methods, however, quickly hit their limits on real-world instances. The second half of the talk turns to metaheuristics: how they are designed, why C++ is particularly well suited for implementing them, and what design choices matter most in practice. We'll walk through a concrete implementation, touching on data structures for fast neighborhood evaluation, generic algorithm design with templates, and the performance considerations that separate a prototype from a production-ready solver. The goal is not to advocate for one approach over another, but to show how C++ supports the full spectrum of optimization techniques. # About Speaker Luka Matijević is a researcher at the Mathematical Institute of the Serbian Academy of Sciences and Arts, whose work bridges academic research and freelance engineering. He's drawn to identifying the right algorithm for a given problem — and to the kind of careful optimization captured by one of his favourite Futurama lines: *"When you do things right, people won't be sure you've done anything at all."* ## 📅 Event Details | | | | --- | --- | | 👤 **Speaker** | **[Luka Matijević](https://www.linkedin.com/in/luka-matijevic/)** | | 🕕 **Date & Time** | **27th of May (Wednesday), 6 pm** | | 📍 **Location** | **Beograđanka, Vidikovac, 22nd floor** | | 🏢 **Address** | **Masarikova 5** | | 💻 **Online** | **[C++ Serbia YouTube](https://www.youtube.com/@cppserbia)** | See you!

**How does a TennisColumbus Season / League run?** The league advertises the season dates and builds a queue of committed players for the season. **Kickoff Day - June 10th** The start day of the season, players are sent a kickoff email that contains important information about the league, the link where your league standings and players contact information. We guarantee 6 playing partners at your playing level, but have been averaging closer to 15+ partners in most cities. The number of different levels we run is solely based upon the number of players enrolled for the league kickoff. Typically we are running a Skilled-3.0, Competitive-3.5 and Advanced-4.0 in most cities. **Your Task - "Flexible Scheduling"** After this kickoff email is sent, it is the **player's task to communicate with other players**. Players should work with their partners to find an agreeable time and location to play the match. While TennisColumbus doesn't mandate your playing schedule, it is recommended that players schedule at least one match per week. By request of the players, we started to allow players to play 1 rematch per season. The regular season is all about playing as much as you can. As of Feb. 10, 2026 we've had an amazing 2,017 players play more than [20 matches in a season](https://www.tenniscolumbus.com/info/MatchesInSeason). **Where to Play?** Play at your local free tennis courts, tennis parks, condo courts or tennis clubs. The league strongly suggests that players jointly try to pick a tennis court location convenient to both. We provide an extensive list of [tennis courts](https://www.tenniscolumbus.com/TennisCourts), including # of courts, lighting, hitting walls, etc. We strive to keep this list up-to-date. TennisColumbus sets up a must play dates to push players out on the courts. The final deadline is the date marking the end of the season, at which point players with 3-5 wins (Actually total is specified on the division page) will qualify for a post-season playoff to determine the league champion. **How to Play?** Players can use three mostly standard playing formats: 2 out of 3 sets, 2 sets with 10 point super tie-breaker or the 10-game pro set (First to 10, used when court time is limited). On Feb. 2018, we added Fast Tennis 4 game pro set format as a valid format. **Playoffs** Each season concludes with a playoffs where players with anywhere from 3 to 5 season wins qualifies for a single elimination tourney. The champion is awarded based upon the league [Prize Pool](https://www.tenniscolumbus.com/info/prize_pool3). Each singles league champion also receives a playing entry into one of two national championships we run. **[JOIN TODAY](https://www.tenniscolumbus.com/join)** Full price is $39.95 to play in a season. The earlier you sign up we typically offer discounts during these tough economic times. Just go to the [Join Page](https://www.tenniscolumbus.com/join) and complete the short form. We'd be happy to find you dedicated tennis playing partners.

Hi ladies. We will meet in front of the Nature Center and head to the two Observation decks. We will then hike Hickory Ridge, Ripple Rock, Overlook and Sugarbush trails to get approximately four miles total distance. We will walk approximately a 18 minute mile pace. Please wear appropriate hiking shoes.

**History** [Chestnut Ridge Metro Park](https://www.metroparks.net/parks-and-trails/chestnut-ridge/) is historically significant because it sits on a 300-million-year-old outcropping of Blackhand sandstone. Geographically recognized as the very first foothill of the Appalachian Mountains, the ridge rises 1,116 feet above sea level. Long before European settlement, the land served as a sacred site for ancient civilizations. The park contains the Old Maid's Orchard Mound, an eight-foot-tall burial mound constructed by the Adena culture between 1000 B.C. and 100 B.C. This ancient landmark has remained largely intact and is now protected on the National Register of Historic Places. The documented modern history of the land began with an official survey conducted by Ebenezer Buckingham in 1801. Original land deeds of sale from this period notably bear the signatures of United States Presidents Thomas Jefferson and James Madison. In the 1830s, Irish laborers arrived at the ridge to quarry its rich Blackhand sandstone. The blocks they hewed were used to build the crucial locks for the nearby Ohio and Erie Canal. Remnants of this early sandstone quarrying operation can still be spotted by sharp-eyed hikers along the modern trails. Agricultural transformation defined the ridge throughout the mid-to-late 19th century. Settlers discovered that the high elevation created a natural air flow that prevented late-season frost damage to crops. Extensive fruit orchards were planted across the slopes between 1860 and 1880. One notable orchard was established by John Wagner, a Spanish-American War veteran who chose the ridge specifically for its proximity to the bustling Columbus market. The park's current name pays homage to the massive American chestnut trees that once dominated the ridgeline before a devastating ecological blight wiped them out in the early 20th century. The conservation story of the modern 486-acre park began in March 1962. The Metro Parks board announced land acquisition plans to block developers from building a residential housing development called Chestnut Heights. Director-Secretary Walter A. Tucker advocated heavily for the purchase, citing the ridge's immense value as a scenic overlook for central Ohio. The district systematically purchased multiple agricultural parcels over the next two decades. After operating strictly as undeveloped farmland through the 1970s, Chestnut Ridge Metro Park officially opened to the public on December 18, 1988. In recent decades, the park has evolved from a quiet hiking spot into a premier regional destination for outdoor sports. A major turning point occurred in 2010 when the Central Ohio Mountain Biking Organization (COMBO) partnered with the park district to develop new infrastructure. Volunteers worked extensively to construct a single-track mountain bike trail, which officially opened in October 2011. An expert gravity and flow trail featuring advanced jumps was later integrated into the loop in 2016. Today, the park successfully balances its deep ancient, industrial, and agricultural history with active recreation. **Map of the Park** Here is a [map of Chestnut Ridge](https://www.metroparks.net/wp-content/uploads/2026/05/CHR_map_1980px_2026.jpg). **Summary** For this event, we will hike the Ridge, Meadows, and Homesite Trails, and Law's Lane, which is unmarked on some maps. None of these trails is individually very long, so we will hike a few permutations and loops until we get in 4-5 miles. The hike will be moderately strenuous. **Where We'll Meet** Drive to the rearmost picnic area at the back of the park. There's a latrine here, but there's no water fountain here or anywhere else at Chestnut Ridge. I strongly recommend you bring some water of your own, at least for after the hike. Cell service at the park is spotty, although your GPS will get you there just fine. The map pin I've provided here is exactly where we'll be meeting and should be able to be used directly in Google Maps, although Chestnut Ridge isn't big and you're unlikely to get lost here. **After the Hike** Afterward, we'll head over to [BrewDog DogTap](https://drink.brewdog.com/usa/brewdog-dogtap-columbus) for [drinks](https://usa.brewdog.com/pages/brewdog-lineup) and [food](https://usa.brewdog.com/cdn/shop/files/DogTap_Menu_2025_65e1ff8b-97d4-4f26-80f1-68321d482025.pdf?v=17356939232910340498). They also have an outdoor area that's extremely popular. I've had their burgers and their pizza, and I think they're both very good. I also really like their [Cold Beer](https://usa.brewdog.com/products/cold-beer-2024) (that's its actual name), which is their American light lager. BrewDog's actual address is [96 Gender Rd, Canal Winchester, OH 43110](https://www.google.com/maps/place/96+Gender+Rd,+Canal+Winchester,+OH+43110/data=!4m2!3m1!1s0x88387c06afa21a85:0x804c611d373d8c54?sa=X&ved=1t:242&ictx=111), and they have a large, free parking lot. We should be there by 5 if you can't make the hike and just want to join us for drinks.