My gameroom has a total of four breakers and a bunch of outlets; though not as many outlets as the post above haha!! I like to put a surge suppressor on each outlet. Living in Florida we have a lot of lightning, plus the ones I buy give six outputs and let the plugs come in from the side which is nice.
https://smile.amazon.com/gp/product/B0046BGUWG/ref=ppx_yo_dt_b_search_asin_title

As far as power draw, modern pins and even older pins don't draw very much power as long as they are lit with LEDs. Converting an older game from the 80s or 90s to LEDs drops the power draw in half or ever less. You can easily hang five games on a 15amp breaker as long as they are LEDs.