Red Dragon Inn is pretty fun and easy to learn. Essentially you’re an adventuring party hanging out at the tavern. You can gamble, pass drinks out to folks, and engage in other shenanigans. Each character has some different abilities or strong suits. Last person to pass out wins. You can even reskin some of the character abilities to match up with your own OCs if you want to do some extra RP.
Depending on how many players and how many shenanigans occur I’d say 30-60 minutes. It’s a full game. One players turn is probably 1-3 minutes or so. It probably wouldn’t be very satisfying to not play out the whole game, though.