Pubs, Bars and Clubs

The strong presence of alcoholic beverages of various types on different tables can cause strong odours, but that won't be driving away your customers since after all, they are there for the drinks but what can drive them off is the smell of vomit which isn't unnatural as some customer could get wasted beyond measure and end up making a mess of the place. You could probably get a few bucks out him for maintenance, but that's not going to help with the disturbing smell. Clubs and pubs also have dance floors so the crowd will be significant and space will be cramped. Clean air is the least you could provide for them.