Summerstage 2010 This year’s free “Summerstage” lineup includes shows in Central Park, East River Park, Betsy Head Park, Crotona Park, Highbridge Park, Jackie Robinson Park, Marcus Garvey Park, Queensbridge Park, Red Hook Park, Soundview Park, St. Mary’s Park, Tappen Park, Tompkins Square Park and Von King Park. All these parks had shows before under the…