The Internet Archive quietly upgraded its in-browser technology to increase its portfolio from around 600 to over 1700 arcade games, emulated in real-time.
There are literally tons of lost classics to choose from; most work full speed on a modest PC thanks to their new technology.
Might I suggest:
Baseball Stars 2
Dungeons and Dragons
Captain America and the Avengers (not a great game, but relevant for today!)
among tons of others. Works in pretty much any browser, any machine (Chrome is probably the best.)
You can keep your Playboxes and SwitchPros. I have a blast from classic arcades. For free!
(but as a non-profit, feel free to give them a donation if you like.)