I would think to keep owners happy, as long as you supply games that keep the patrons of the establishment interested and they stay there and keep spending money at said establishment they would be happy.
So make contacts, find locations, and try to figure out which games will do well there. Unless your talking about putting pins on location, I would say it's safe to assume most games would be JAMMA. Most people going out now a day's are probably not going to be into the classics such as DK, Pac-Man, etc. More of the games that they played like SF, MK, NBA Jam, and shit like that. The reason I say that is I am in the age group of the bar crowd and this is what I would want to play. But, if you want to make real money just get a damn Golden Tee, that seems to be the bar favorite, and for restaurants get a driving game as you'll have little kids begging their parent's for money so they can drive around for a bit.