No, when my best friend slept over or I slept over at her house we slept together because we had double beds. My friends and I never had huge sleep over parties, it was usally only 1 to 2 other people.
*shrug* I just know there were plenty of times as a kid I slept on the floor due to bigger parties like birthdays and stuff, or if we all just got together. Making a "pallet" was a pretty regular thing.
And especially in my later teenage/young adult years at prime drinking age, I'd end up on the floor all the time. Gotta make due with what you got when you're drinking with a bunch of dumbasses in a 1 bedroom apartment.