It might have a good chance as a Men's Game Club. Kind of a central man's cave...with an attractive hostess.
Pool is just one game. There has to be plenty of other offerings so there are options during busy times. Poker, darts, chess, backgammon, etc.
I would definitely do tournaments among the members; it keeps people interested in renewing their membership.
You have to carefully control guest usage. Something like $20 guest fee and no more than 4 guest visits per month; otherwise you get lots of "guests" who should really be members