The South End, with its blocks of Victorian brick row houses, upscale restaurants, and art galleries, is swiftly becoming one of the most popular places to live in Boston. Many of the row houses underwent renovation starting in the 1960s, and today the neighborhood is filled with a diverse mix of families, young professionals, a gay and lesbian community and a thriving artistic center. Trendy restaurants brush shoulders with coffeeshops and Mom & Pop grocery stores along Tremont Street and its side streets all the way down to Washington Street, which is experiencing an artistic revival - a significant number of artists are moving in, and galleries are cropping up around the area to show their works