Besides NLH and PLO8 (and Big-O), we play Crazy Pineapple 8 (declare, spread limit, usually), Scrotum 8. More rare but when we feel particularly degen-y, we'll incorporate some Elevator 8, Irish Omaha (Big-O but can use 2 or 3 cards in your hand--can you say hidden boats and quads?), and other wacky games.
We used to play more wild [card] games like Baseball, Low Chicago, Queens and Follow, etc. but we've moved away from those.
View attachment 1017023
A friend introduced Elevator, and I added two variants to it: "Express Elevator" which has one fewer floor so there's fewer rounds of betting, and "Fire Escape" which is Express Elevator but you can play one of the two 3-card vertical columns that make up the "building" (with 2 cards in your hand).
Check out
https://www.pokerchipforum.com/resources/abby99s-mixed-game-cards.45/ for more games and
https://www.pokerchipforum.com/threads/your-best-6-pl-circus-game-rotation.94430/ for a recent discussion on (pot limit, split pot) circus games.