I think it would be cool to implement something like a paintball or airsoft field into the game. It would be fun and a great way to practice your gun skills on real players without going around and shooting people.
Edit: I saw another post that was asking about paintball and it was a confirmed feature.
Just imagine playing pool against another player or maybe even against 2 or 3 players. Smoking cigars, drinking beer, communicating with each other, chillin'. I want to buy a pool table for my MC clubhouse.