Well, every room owner has a choice.
You can try to make money off recreational players: in that case you'd worry about things like decor, cute waitresses, food & drink, really loud music, etc. In other words, you'd make it a lounge with pooltables.
If you're thinking of catering to perpetual players, the waitresses are going to have to be educated to not walk in a player's line of sight when he's down on the shot, the volume of the music will have to come way down, you'll focus on equipment rather than decor and fancy cocktail drinks. AND most importantly, you'd have to create an action and tournament friendly atmosphere. If you can throw a snooker, tight pockets, and 3C table in with the others, all the more respect you'll get.
I understand the best way to make money is to appeal to both audiences. BUT, being successful at that requires a lot of tact and smarts. Usually if you throw both crowds in together, serious players will leave the place alone and the place will be relegated to banger-spenders...
Like others have said, whatever you do, SEGREGATE the room into two parts. One for serious players with serious equipment, action; and the other for the party crowd. There is nothing more grating on the nerves for me than being thrown in together with people that don't take the game seriously. I think that will give you the most money and respect.