Dinner and a pyjama party sounds fun. To spice it up a little…
* ...Turn it into a motto party Simple, but fun. Make it a night of idiotic songs, for example, and sing along to things like “Barbie Girl”. Call it a “Goodbye, Childhood” party and play all the games you played when you were little.
* …Work down a list of challenges I did that with a bunch of friends, and it was surprisingly fun. We went around the town with our lists. We spent a while at the library, humming quietly behind bookshelves and watching surprised people look around. We left a few small presents for people to find and, riding the train, would swap our seats every ten seconds or so. We ate cake not using any hands, and had a whipped cream fight on the balcony. There’s lots more, and we still talk about that a lot.
* …Make it a murder mystery dinner Lots of fun, and not that expensive. Everyone gets a character to play, and during dinner, everyone tries to find the murderer in the room. If your friends are creative and not too grown-up, they will love that.