Many players perform in exo's in what little off season tennis has. Anna played in Nov/Dec last year in Colorado, Michigan, Florida and S. Africa. The exo's bring tennis to places that may not hold a tournament. I went to the one in Tampa, it wasn't for charity though.
I like 'em, I hate 'em, I like 'em, hate 'em....
I like them because it gives people (like me) an oppurtunity to see some live tennis!
I hate them because I feel like players should be taking this time to rest and re-tool for the new season!