Endorphin is a fitness studio at 3170 E. Colfax Avenue in Denver’s City Park neighborhood, one of five Endorphin locations across Colorado. The studio runs group classes in cycle, HIIT, Metcon, Dirty 30, yoga, and barre, and also operates a small functional gym with a kinesis cable wall, free weights, treadmills, and cardio bikes available to members during staffed and key-fob hours from 4 a.m. to 11 p.m. daily. Locker rooms, showers, and free parking on Colfax and in the adjacent garage round out the space. The company was founded in 2007 by local owners Corina Lindley and Chris Lindley. As a member of the Colorado LGBTQ Chamber of Commerce, Endorphin serves the LGBTQ+ community in Denver.