Bicycle Center and Guthrie are on about 7th east (7 blocks east of State Street; typically considered the center (north/south)) and 2100 south. that's probably pretty close. I have dealt with both quite a bit; more with Guthrie, but I have been happy with both shops. Farther north is Contender; one of my favorites. They are up on 9th south and 9th east. I know they do rides almost every Sunday morning. Farther south (by me), is Revolution and Canyon; both do regular group rides as well.