Starlight's having a reeeeeally bad week. While trying to find the mop storage room, she walks into another door in Twilight's Castle. And winds up in an interdimensional bar.
Crossover with the 'Tales from the Barman' over on Twisting the Hellmouth. https://www.tthfanfic.org/Story-19941/Methos+Tales+from+the+barman+Part+II.htm . Chapter 108. It's a very good series, I like.
Enjoy!^_^