Seems to me it would be the most normal thing in the world for someone to walk into a bike shop with cycling apparel on. Umm ... HELLO ... it's a bike shop! I just went to mine a couple of weeks ago with my friend, both in our cycling garb, having just done a ride that had driven to. We dropped off our bikes to be tuned up. I was wearing a jersey, cycling shorts with mid calf lycra pants over them and fuzzy winter boots! (In Southern California). It was an interesting look, but I strutted in there like I was all that and ... since I go to the greatest bike store in the universe ... I was treated like I was all that. The owner's face lit up when he saw me. He yelled hello and then gave me a hug. I got a hug! THAT was a first.

Anyway, I don't know what your shop is like, but I wouldn't think twice about walking in there with your cycling clothes on. You're a cyclist. Even if you weren't test driving a bike, you might be on your way to or from a ride and happened to stop by. But you should wear your stuff even MORE so if you're testing a bike. I wouldn't do it any other way.

Go in there with confidence. If you walk in feeling like you belong and that's it's perfectly normal to be wearing what you're wearing, then you'll feel better and won't appear to be self conscious ... which is the only thing that might make the whole thing awkward. Feel the lyrcra! Be the lyrcra! You look amazing in lycra!!!