BalletMet to take the stage before small audiences beginning in June Peter Tonguette Following a 15-month, pandemic-prompted break from live performing, BalletMet has returned to a very familiar stage for a series of performances that began last month: the company’s performance space, a small, black-box theater located at its Mount Vernon Avenue headquarters. There, the company has been performing “Unlocked,” an hourlong collection of short dances for limited-capacity audiences that, at first, consisted entirely of the company’s donors and supporters. “Our donors and our board and o...