Class-fill text sent two hours before a half-empty class

Check your booking software two hours before each class, and if it's under half full, send a text to members who haven't been in for two weeks or more offering an open spot in that class. Include the exact time and instructor name.

Why it works: A short-notice text targeted at people who haven't been in recently fills seats and re-engages members drifting away at the same time.