'Bad boy' Bikram
Like many gurus before him, Bikram Choudhury, has had his detractors.
Based in Beverly Hills for 26 years, he has the mansion, the Hollywood star friends and a fondness for Rolls Royces.
He is also a little tough on the competition, the man described as "Yoga's Bad Boy" calls other teachers in the US "circus clowns" and is prone to issuing class action suits against anybody who tries to use the Bikram name without paying the franchise fee.
Choudhury's fans can sometimes come across like devotees but he has managed to take a 2,000- year-old tradition and re-package and re-invigorate it for today.