"SOME EXHAUST," Lehmann Maupin, 540 West 26th Street, (212) 255-2923, through Sept. 25. As installed, this ambitious group exhibition has all the charm of a crowded, infrequently visited garage, and not by chance. Its roughly 50 works by mostly young artists all meditate, often revealingly, on that eminently American space. But the main event is the setting, designed by Matthew Lusk, the show's organizer. It offers a more derelict version of the gallery's facade and hints at the inner garage lurking behind its swank Rem Koolhaas/OMA interior.