Makes sense. Low barrier to entry, low carry cost once the capital is purchased and a reasonably cheap lease is found. Could see this becoming the yoga studio equivalent for upper middle class guys moving forward. My wife is a yoga instructor and personal trainer. What I've see over the years are parallels that make this very reasonable:
Businesses coming and going pretty readily
A lot of vanity businesses where covering costs plus some below market return is sufficient
Instructors floating between the studios acting as independent contractors
They serve as a micro-community with some retail aspects and a common activity/interest at their core
The successful ones end up with a core group of regulars that have a shared interest in making the finances work for whoever the owner/leaseholder is