Drinking involved: LOTS!
Set up the four shot glasses in a row going away from home base (the designated shooting spot for the quarter).
Each player on the visiting team takes turns shooting the quarter at the shot glasses.
The first glass represents a single, the second a double, the third a triple, and the last a home run.
Three strikes (misses of all shot glasses) and you are out. Three outs and the other team is up to bat.
Game follows as regular baseball and runs are scored in the same way (except that you have to keep track of the runners on base in your head).
Drinking happens in the following manner:
This game is pretty simple but lots of fun (and lots of drinks)!