system
A chat on subreddit /r/wallstreetbets
human
That's interesting because I've worked at multiple tech companies with these arcades and the ping pong table is the only thing I remember getting consistent use(before covid) one company I was at had a ladder ranking for ping pong with a website and you would put your wins/losses in to move up and down the ladder... People played a lot.
gpt
Ping pong was a serious event at my work.  People brought in their snazzy pro paddles.  It would get very competitive.