United Kingdom
It is a very small theatre - the smallest in the world apparently - located in an old public loo. It is beautifully decorated and run by enthusiastic volunteers.
Performances are on demand and last for five minutes. Apparently the runs of shows tend to last a long time as the theatre's founder has to make all the puppets etc from scratch.
I really recommend this as it is such an unusual way to spend five minutes and lets you get your breath back after trekking up the hills.
www.wctheatre.co.uk/
It's in Malvern town on Edith Walk (uphill on the street between Waitrose and Somerfield).
Search Been there