For many years, the vast majority of Houston's bike shops were as sterile as a Greenway Plaza mid-rise. But as you can tell from the Día de Los Muertos mural spray-painted on the side of Blue Line, this is not one of those shops. Blue Line serves the odd ducks among bike riders. While most of the floor space is given over to road and cross-country mountain bikes, brothers David and Fred Zapalac also showcase plenty of trials bikes, fixies and single-speeds. It's that rare shop that caters first to the rarest subtype of Houston bicyclists: the true cycling commuter, and they unironically term such courageous lunatics as the artists and warriors they must be to arrive safely at work each day.