Gameworks might be bankrupt (?) but every one I know of is still open. The Dave and Busters and Jillian's places are still open too.
The draw for these places is not just the games, but it is the games for me. The ability to drink, smoke, eat, socialize, AND play games is what does it. It's the whole experience.
I wouldn't try to open a regular arcade. The only way I'd try to do it is to have a bar and restaurant that can make money (alcohol = HUGE, easy markup), and have the games just as a bonus. The games can't really make much money on their own.
A beer bought in a case is what, $0.30 each... at most bars they are $3, at a few of the nicer bars around here they are $6.50. SIX FIFTY! For a Thirty Cent bottle of beer. It's crazy!
That's why I love my gameroom. I can drink beer cheaply, listen to whatever music I want, watch whatever I want on TV, and play games that work well and are clean. However, it takes effort to get people around for socializing (read: have to throw a party, or at least invite some people over). Which I don't like to do all that often, as it takes effort and planning, and I'm hugely non-committal at this point in my life.
Wade