Every Friday night in downtown Somerville, Main Street is lined with classic cars. It attracts a lot of people most weeks, which is good for the ice cream places and pizza joints. The crowd doesn’t do much shopping in the stores, so most of the stores don’t even open anymore. Many of the merchants say they actually lose business on Fridays because the cars start parking at 3 p.m. leaving the customers no place to park. The cars look cool and always make for good photos.