Just a day after sharing the Central Park Summerstage bill with St. Vincent (it would be an injustice to say she was merely opening), tUnE-yArDs will take the stage as special surprise guest tonight at the Grand Opening party for The Rock Shop, Brooklyn’s new Skippy McFadden-booked venue at Fourth Avenue and Carroll Street. Radius clauses being what they are, they weren’t able to make the announcement until after yesterday’s Central Park show was over. The bill tonight also includes Sharon Van Etten and Lady Lamb the Beekeeper. Tickets are $15. It should be a good one.