There's an interesting bike shop Denver in Highland Square. The Urbanistic Tea and Bike Shop offers a full service bicycle repair shop and loose-leaf tea and spices. More at their blog. 3215 Lowell Boulevard.
The Philadelphia International Cycling Championship takes place this weekend. I was hoping to talk to somebody from the Nigerian National Cycling Team (!) who were scheduled to participate, but they apparently ran into some visa problems and couldn't get into the country. They train at altitude but lack supplies, coaching and experience, so I'm sorry they're missing out on this opportunity.