This should give you some ideas, depends on your tastes. My first game room had a separate switch for every game, so power was not wasted, diagram and labeled, to keep my parents happy. This below is how most of my current rooms are done, this room is still under construction. Top left are for wireless switches, plug in strings of lights and things. Lower left controls the rooms multiple light sets, there's bright, 30% normal, black light or color and finally mirror balls/disco flashing lights. Middle controls lower half of the 4 walls, usually set for pinballs, and right side controls the upper half of the 4 walls, for video games and neon signs. Going away or a storm approaching, just flip them all off and your games stay safe. Should a game start smoking, anyone not familiar with them can reach the switch and turn the game off, hopefully preventing more damage. These switches are under a buck each, and the outlets are 2 for a buck.
Gamerooms back in the day mostly had video games, and when new, didn't mind the power flick on a bank of games. Pinballs were switched on/off separate, along with skeeballs and other larger games. Keep that temptation down when flipping on a bunch of arcade games that are over 20 years old, something is bound to break.