Thing is you could have 100 machines but out of those you probably wanna play 20.
How do you decide what games to put in them unless you go really big and have everything most would like, my choice of games probably wouldn't be many others choice
If your having a meet up with a load of members you want a good selection of cabs to play so that won't work for small places
To make it worth it going for me I wanna see loads of Sega Simulator stuff or any other simulator cabs, Sitdown older games or even the later 90's - 2000s driving simulators, stuff I never got to play or seen in arcades, Ridge Racer with clutch and gears as I remember having go when that was new and not lasting long in full manual mode, so being able to play on that would be good without throwing loads of coins in.
Most joystick games you can play anytime at home on Jamma Cab or Mame so that doesn't get me to go somewhere, any games with special controls yeah cool or even the ones mirrored with artwork is great to see, that's just me and appreciate some probably happy to see loads of standard joystick games in original cabs