Went to have a fun night playing bingo with my daughter....the room was full of cigarette smoke by round2. After all these years, I still cant believe they dont put up a divider for one section of smokers and they other for non smokers. I cant go back it was that bad. How about air exchangers? Smoke extractors do exist as well for fires. Just turn it on every 10 min and it would expel all that second hand smoke. In 2 min it would clean the room.