My girlfriend and I went on a hiking weekend with her family and some friends.. They did this every year...
It was kinda cold in our room (as we were sleeping next to a fire exit) so my girlfriend decided to built the blanket fort!
It was amazing!!! Did so in the company of a few friends and played games, watched some tv shows. Then we did, indeed, sleep in the space that once occupied the tent...as it had started coming down amidst the fun.
And, unlike when I was a child, I didn't have to wake up with a sore back because I'd somehow fallen asleep on Optimus Prime. Instead I just woke up with a sore back because I'm old and that's how I wake up every day.