You'd let out a long yawn and stretch your limbs as you finally awoke. Only to let out a yelp as you felt an intense headache pummel you senseless.
"Guess I had a few too many drinks last night." You casually mutter as you rubbed your temple. Your eyes were still firmly closed so you wouldn't disorient yourself as you tried to remember what the hell happened after you gulped down that last drink.
You start to remember the drama between your friends becoming too much to handle after a while, as you decided to duck out at the last minute to avoid the escalating dispute. "Yeah, that's right, I went over to Claire to spend the night there while the girls cooled off at home."

But where did you end up?

On a bed.
You awoke to the sound of a loud, gurgling fart exploding dangerously near you, quickly followed by a wretched stench that forced you awake, actively making you forget about your hangover for a short while as you noticed Claire's absolutely titanic, sweaty behind facing you.

Stationary Bike.
Due to the unannounced drop-in, and Claire lacking proper furniture for her friends to sleep over at the last minute. You had taken a seat on her stationary bike, hunched over the steering handles. You did remember her seat leaving a considerable sweaty stain on your jeans, but you were too drunk to mind it too much. Although the empowering scent of her behind lingering on the seat did make it hard to fall asleep.

Back of the toilet rim.
Feeling whatever mixture it was you drank the night before, you had the constant gagging feeling deep down in your throat. Making your way to the bathroom, you sat down by the toilet in case you'd throw up. Fortunately enough though, you didn't.
But you did wake up to a distinctive stench you recall from the school's bathroom after everyone succumbed to food poisoning.