The indoor my local group meets at has a small exhaust fan and two Smokeeters. Twelve of us completely overwhelm the system. I go home feeling like I smoked 50 cigars instead of 4.
A customer of mine wants to put a raised floor poker room in at his shop, we want to do a laminar flow from the floor up and out of the ceiling, using an energy recovery unit. It's a pipe dream at the moment, but I'm excited to see if we can get it running well.
I don't know what I don't know.