So let's talk locks and security

Well... I would imagine they're just trying to edge him out cos his face don;t fit: He's very stylish, attractive, sometime model, art teacher and VERY cool. People who have spray tans and drive 4x4s are afraid of people who are stylish. FACT.

Surely it is the staff that are not allowing the Bromptonenger in to the gym, rather than the perma-tanned patrons with the 4X4?

Or is your point that they have brow beaten the staff into refusing entry to the gentleman in question because his very existence impugns their own?