The local cigar lounge (The Mark) uses a combination of Smoke Eaters (2) (
http://www.breathepureair.com/uas_se50.html) and Rabbit Air Minus A2 (4) (
http://www.rabbitair.com/pages/minusa2-air-purifier). The HVAC in the lounge is not very good so there is little outside air exchange short of opening windows.
The air is OK but would be better with outside air exchange. Oregon has a limit of 42 people in a lounge. When the lounge is half full or more the system suffers.
Having said all that, it would be much, much worse without the SmokeEaters and Rabbit Air systems.