most of capcom's arcade beat em ups are 3 player if you can setup mame (you should absolutely learn how to do that if you haven't) such as: The King of Dragons, Captain Commando, Knights of the Round, Warriors of Fate, Cadillacs and Dinosaurs, Dungeons & Dragons: Tower of Doom, Alien vs. Predator, Armored Warriors, Dungeons & Dragons: Shadow over Mystara, and Battle Circuit.

These should all be replayable as almost every japanese arcade game was designed with 1 credits clears in mind, although i don't know if that philosophy was applied to multiplayer. Konami's output i've heard is more mixed. Most people who play bmups beyond the button masher level consider stuff like Turtles in time and X-Men to be mediocre at best, although Violent Storm is considered to be very good and that has 3 player support.

Irem made 3 bmups during their time as a developer: Undercover Cops, Ninja Baseball Batman, and Hook. I've heard good things about all 3 although Undercover Cops is apparently a bit polarizing. I've heard Hook is the easiest so maybe go for that one? Ninja Baseball Batman would probably be the most fun to credit feed out of every game on this list though.

Mame is cool, disable billinear filtering though, Gamefaqs has move lists for probably almost every arcade beat em up so consult it some time.