Franchising a Gym (Goodlife, Canada)

anyone have any experience with franchising a decent sized gym (weights, aerobics, treadmills, etc).

There is a rather large and decent one in Canada (primarily Ontario) which I have been a member with for 7 years now or so… they are still expanding and are doing quite well.

Anyone have any experience with franchising a gym – profitability, cautions, etc?