This group is intended to be a smaller version of '20s and early 30s in Phoenix', for those in the 21-33 age range who enjoy doing stuff regularly and want to build more long lasting friendships, whether you're new to Phoenix or just want to expand your social circle!
The idea is for anyone to be able to post things like house parties, dinners, drinks, hiking, pool parties, bbqs, movies, game night, karaoke etc and know that you'll be inviting and meeting like-minded people within the same age group who you'll likely get on with.
Right now it's mostly people from the big group who've met up multiple times and already know at least a few of the others in this group fairly well. It's like a friends of friends network. So I'd recommend joining the big group first to get to know some of the regulars.