Nobody that rides to work can possibly be a poseur (unless they ride less than 1/4 mile).

Microbrew? Macrobrew hardly fits the definition of the rest of the world's definition of beer.

Vegan? Does that mean you do secret rituals in the park late at night?

Music?

Style? Frankly, I'm not into "fixie style"- mostly for my own reasons- but I don't judge other people for it... maybe I feel I'm a bit too old for the "fixie style thing."

A poseur (and I'm sorry to even discuss the reality of the term) would be someone who spent a small fortune on the newest and best fixed bike and clothing/accessories, then maybe rode 3 miles/week on the walking trail around the local pond.