Tourists looking for old Paris charm and a taste of “La Vie en Rose” should head to Belleville, a largely overlooked part of the city and the birthplace of Edith Piaf. Only five Metro stops away from Paris’ town hall, Belleville has retained much of its working-class identity and still bubbles with concert halls, theaters and bars — some of which Piaf once sang in. Add to the mix successive waves of immigrants and young creative types out drinking, eating and carousing, and you get a funky atmosphere similar to New York’s East Village.