Kenselton Hotel Saga

A series of fics in which various characters get zapped into and trapped in a mysterious hotel within a world in which they are, allegedly, fictional. (Fics are listed in chronological order, but each works as a standalone.)

Real World (2003-2006)
Marty McFly discovers that he's fictional in another world, and then gets zapped there into a place called Kenselton Hotel – along with fellow unfortunate victims Neo, Ted 'Theodore' Logan and Frank Bannister. Luke Skywalker was an accident.

The Not-Particularly-Excellent Adventures of the Keanu-Spawn (2005-2010)
Neo and Ted are snatched into a new version of Kenselton Hotel, and trapped on the 4th floor of Block F with a some of Keanu's other characters who don't really like each other very much.

Quinto Formaggi (2010-2011)
Several of Zachary Quinto's characters get trapped in a hotel. Hilarity ensues, as does tragedy, because one of them is a serial killer who just wants to be special.

#

Each of the three main fics above had their own sequels and/or spin-offs that are available at the respective pages.