Katrina Schaag performs with Moxie Rhodes in “The Sadie and Vedette Penny Arcade,” a looping performance installation for private viewing only. Guests assembled outside the Penny Arcade, and were led one by one through a narrow hallway and into a Victorian parlor. Each viewer was instructed to eat from a bowl of flowers and drop 5 cents into a velvet-covered coin machine slot box in order to start the show.