Drink and Draw!
Details
Bring a sketchbook and your pencils, pens, markers, etc., and hang out with fellow artists who are all passionate about capturing the world around us. There are alcoholic and non-alcoholic drinks available as well as rotating food trucks. You can read more about them on Yonder's website.
As always, enthusiasm is FAR more important than skill. If you can't decide what to draw, here are some idea generators:
Art Idea Generators
Art Prompt Generators
If you're looking for photo references:
Pinterest Ideas
Unsplash (lots of copyright free pics)
(Be mindful of copyright laws when drawing from reference images. If you plant to sell or make money from them, the photo must have the proper license to allow it.)