I....It's kinda crazy, but there are so many little faux-pas that roadies use to identify other "real" roadies. As in, real roadies don't wear camelbacks, don't have reflectors, don't have mirrors, don't wear cotton, don't have tri bars, etc, etc. Show up on a group ride with any of these things and don't expect to feel very welcome. I know, it doesn't really seem fair

That being said, the "discrimination" is partly because group riding requires so much trust of the riders around you, that often times, these faux-pas are red flags that a rider is new to the road . . .