Being authentically you?
Are you easily influenced by people around you? Are you the 'I don't mind what we do' kind of person? Do you always put other people first?
If you go to an 'authentic' Indian restaurant, what do you expect?
If you go to a 'fusion' restaurant, what do you expect?
When you go to an 'Anglo-Indian' restaurant, what would you expect?
Then apply the above to a yoga class - Is the teacher being authentic?