A favorite of the group that I hung out with when I was in the 21 year old range was the infamous "Monthly Bill,"
It was quite literally a drink that we concocted one night at "The Loading Zone," in Wausau WI (great fish fry, BTW,) during a buddy's 21st bday bar run (luckily for me I was already 21,) and I think the Zone was the only bar that knew it by name...lol.
Grab a baby food jar or similar sized glass
2 shots of Hot 100,
2 shots of Bacardi 151
and top off the jar (Baby food jar worked out perfect for our needs,) with Tabasco or the hottest sauce the bar has on hand.
Very few actually kept it down...lol.