Usual thoughts apply, considerations like rent, rates, insurance, maintenance of premises, maintenance of hardware, overheads like employees/advertising/promotion/purchases, and so forth...mean to even break even and keep the doors open and lights on, the place has got to turn over some funds...and probably would run at a loss for the early stage meaning there'd need to be some capital there to leech from.
After watching the below video just there, I wondered why stop at just Arcade machines? It absolutely should have a selection of pins...but also a stretch of crts and old consoles wouldn't go amiss either. Two of everything (Steve Style), x2 Amiga's, x2 C64's, x2 Spectrums, x2 Amstrads, x2 NES's, x2 Snes's, and so forth....bring people right back to their youth, not only via cabs, but by consoles and computers too. Such wouldn't cost as much as cabs, have Everdrive's in everything...and give it a real cheesy 90's name like Xenon Palace or something Sounds like a place I'd want to be a member of and drop some coin in.