gymatorium 

A combination of a gymnasium and an auditorium, usually in a small high school. It has a full court gym floor with bleachers on one side and a stage area in the opposite side (set into the wall).

We had to set up the chairs and bleachers in the gymatorium to get ready for the opening night of our school's play.

Our school's so small, we have our drama and basketball games in the same place, the gymatorium.

gymatorium by Katie Hanson March 2, 2007

gymnatorium 

The most craptastic multi use performance space in the world... second only to the cafegymnatorium... When you see a gymnatorium you know your day will suck.

Hey, lets go see a show in juniors gymnatorium tonight... the show from last year might still be echo'ing around in there.

gymnatorium by travelingSTAGEHAND February 24, 2010