I'll go Monday. I'm not a huge fan of Hop Haus, but it is very easy to get people together there; on a Monday night, the dining room will be pretty much empty.
(We do ChiSec every month at Hop Haus).
Hopleaf is D.O.A. for a meetup. It's a madhouse every single night of the week.
I'd love to convince you all to meet at Violet Hour, but I'm thinking $11 cocktails don't match the Chicago startup ethos.