You're getting downvoted, but every party needs one at least soberish person when shit hits the fan.

Source:
-Former teen who had to clear out the particularly wasted folks and direct emergency services to the party spot when some girl drank too much, rolled off a small cliff, and smacked her head on a rock. Sucked for me, but could've sucked much worse (popular line when she'd convulse a little after we got her up was 'dude, she's just faking it for attention'. Yeah, maybe - or maybe she just fucking dies surrounded by drunk dicks tossing Axe cans into campfires).

-Parent of another former teen who, just as begrudgingly, has helped their friends avoid hospitals, jails, and the grave for reasons of adolescent stupidity.