For sixteen years, the Tandem Club of Colorado has been promoting togetherness on bicycles built for two with rallies, rides and fun events. Last month's annual meeting, held at REI's flagship store in Denver, has attracted about fifty people of all ages. This season's events include the Tour de Denver on June 9 -- a 55-mile ride from Aurora to Confluence Park and back -- and a seven-day round trip from Leadville and back, which winds through Glenwood Springs and Salida, covering distances of thirty to seventy miles a day. Rides can be any time, anywhere, but helmets are mandatory. Buddy up and take a ride.