Our main club test track has 5 OO gauge tracks and one P4 gauge track. It is set up about 1 Wednesday in 2, and many members bring stock to run on it. When not set up our Greenfields OO layout is often running instead.
The N gauge test track is brought out whenever someone has something they want to try out.
There is a 3 foot long multi-gauge track permanently set up in the club room to test locos and check they run smoothly.