If you see a dark green trolley car rolling through the streets of Longmont this weekend, don’t be alarmed: You haven’t been transported to turn-of-the-century San Francisco. What you’re probably seeing is one of the city’s newest businesses, the BrewHop Trolley. Husband-and-wife duo David and Radha Lewis are giving new life to the former Philly vehicle, once in the employ of the Philadelphia Art Museum, as a combination shuttle and tour bus for Longmont’s thirsty residents. The trolley will be running from noon to 9 p.m.