The May Fair is a free annual neighborhood festival in Clark Park, at 43rd and Baltimore in West Philly. Take any of the Green Line trolleys (except for the 10) to get there from Center City.
As for the Dill Pickles, they're:
. . . two Narbs and a carpetbagger [and one of 'em blogs], playing fiddle tunes and jug band stomps better suited to the Great Depression than our Shiny New World of the Fut. . . Oh wait? You say it feels like Black Thursday all over again? Well then we’ll fit right in. And so will you: we’re gonna party like it’s 1929 (except now the booze is legal).