there's a tuesday night group ride near me, i did it once so far but have been busy the past couple tuesdays to do it again. they average 16-18mph and its about a 2 hour long ride. I was the only fixed gear, and i was definitely the only Clydesdale; there was one hill i had to walk up, but other than that it was actually a nice ride. the group gave me a round of applause for finishing the 26 or so miles with them, being the only fixed gear, and i assume for being the biggest guy there haha!