How about a Pool square

Keep your arms and upper body out of the water and don't be an idiot and splash around.

Get off your feet and jump around

What I read here is :
Don't have fun in the pool because you might ruin the pool table. I mean, it looks fancy, but I feel like both pool ruin eachother, and that having them separate would make each one better.

And what popular game might you play on a billiards table

The obvious response to this is 'billiards' but guest probably doesn't know another name for it is pool, probably a cultural thing