"If you have already done six impossible things this morning, why not round it off with breakfast at Milliway's, the restaurant at the end of the universe?" I guess everyone would be there, eventually, and at the same time. It has its own tenses. Go read the book.
Doctor Who, Torchwood, Star Trek, Back to the Future, the Hitchhiker's Guide to the Galaxy, Dinoverse, Artemis Fowl, Life on Mars, Sherlock, Heroes, and a phonebooth from Bill and Ted's Excellent Adventure.