A variation on quarters is called chandeliers
It involves all the same rules as "quarters", but along with the center glass, each person has their own cup with a drink poured in it.
If you bounce the quarter into another person's cup, that person has to drink from it, depositing the quarter on a paper towel (the "tampon"). Bouncing a quarter in any cup means you continue bouncing...whee!
Bounce a quarter in your own cup, and you must take that drink plus one more for stupidity.
Bounce the quarter into the unfilled center cup, and everyone must chug the drink in their own cup. The last one to finish must drink again.
Bouncing the quarter into any three cups in a row allows you to make up a rule, such as "no swearing", "must drink with your eyes closed", "no using names", "no pointing", etc.
Breaking a rule means you drink again.