From downtown to the Outer Mission and North Beach to Chinatown, there is no time like the present to check out these historic San Francisco restaurants. The curtain-lined booths at Sam's (Courtesy of Sam's Restaurant)Sam’s GrillSam’s epitomizes classic San Francisco with its rows of curtained booths and bustling, wood-paneled dining room. One of the first restaurants to open after the earthquake, John’s Grill reflected downtown’s resurgence and emerging scene. (Chinatown), hangahdimsumsf.comTosca Cafe in North Beach (Courtesy of @toscacafesf)Tosca CafeTosca opened in 1919 and has since become synonymous with North Beach itself. // 242 Columbus Ave. (North Beach), toscacafe-sf.com