Friends visiting you at Uni

Where do they stay? i have a room so small, i can't imagine them all fitting. Though they are coming for two nights how does it work? like i know we are gonna have some heavy nights aswell and as they are my best mates, id like them to have a nice place to sleep!

How many? We used to camp out on the floor/top and tail when I visited my friends at uni. It's not ideal but it's free and noone cares when they've had a few.