Bike Night

It's a two-wheeled cruising machine - alloy spokes, bent handlebars, custom seat and paint job... yet, I get these very odd looks and wild laughter when I pull my bike up to an establishment that advertises: "Tonight is bike night - Cheap beer." Is it my biking shorts? Is it my cleated shoes? I know it can't be my custom machine... everyone at the bike trail comments on how nice of a two-wheeler I have! I've even gotten dates because of my bike!! A man on his custom cruising machine out to get a couple of cheap beers... I just can't figure it out!!!