Margo Cheroute and Rose Whitlock are lovers of all things vintage and the art of shopping for the good stuff; lucky for us, they've done the work, and all we have to do is buy it from them. The trick is in finding them: We did last summer, during First Friday on Santa Fe Drive, when their Airstream trailers dropped out of the sky like little UFOs from another era into a lot at Eighth Avenue and Inca Street to sell their wares as Cha Cha Muchacha. Cheroute explained then that Cha Cha Muchacha is meant to be a flash venue, which is apparently even more ephemeral than a pop-up shop, so there's no telling if we'll see them there again, but a girl can hope. If you love Bakelite and circle skirts and other anachronistic goodies, keep your eyes peeled.