 In the mid-1970s, the Arkestra sometimes played free Saturday afternoon concerts in a Germantown park near their home.At their mid-1970s shows in Philadelphia nightclubs, someone stood at the back of the room, selling stacks of unmarked LPs in plain white sleeves, pressed from recordings of the band's live performances.In late 1968, Sun Ra and the Arkestra made their first tour of the US West Coast.