Came here to see Above & Beyond earlier this year, and coming from Chicago music venues, I'm a huge fan of the Canopy Club. Yeah it might be a little small, might get a little packed (and I didn't know they had coolers with water, that's even better). But overall, the crowd here is good since it's predominantly U of I students.
I thought the acoustics sounded great (but it was a DJ, not too many vocals) and I also like how there are 3 different bar areas, drinks were easy and fast to get. If you feel like taking a break from dancing on the main floor you can always perch up on one of the seats up in the balcony.
Expect it to get HOT during packed shows, but that's expected. Also don't plan on using their washrooms unless in dire emergency.