Shirou, Go home, you're Drunk

Don't even know where this came from. It popped into my head, I giggled, thought it was incredibly juvenile and stupid, and thus came to the conclusion I simply had to write it.This takes place in an AU of F/SN. What AU is altogether uncertain, but it's one where the cast is alive and together for a party, largely due to the powers of undiluted crack. Rated M for safety, as though nothing explicit happens "on-screen", it's definitely iffy to put into a T fic.