View the Entire Photo Gallery Jonathan Hammond backstage before the show. Photo by Joseph Marzullo/WENN

Off-Broadway performances of the site-specific staging in a Manhattan commercial loft (dressed up as a bachelor apartment) will now play to March 28, Transport Group artistic director Jack Cummings III announced on Feb. 25. It was originally to close March 14.

Sold-out houses followed the mostly enthusiastic reviews that appeared after the Feb. 21 opening night. The venue, on the 12th floor of a building on West 26th Street, accommodates 99 people, making them flies on the walls of the groundbreaking comic drama about tension between gay men at a birthday party in 1968. Some theatregoers sit in traditional folding chairs along the perimeter of the space, which offers north and south Manhattan views; a few are seated at a dining room table on the set, representing Michael's gaudy-modern-eclectic pad.

The play, which inspired a generation of gay playwrights, received an Off-Broadway revival in 1996. The Transport Group production marks the play's first major New York revival since then.

The TG cast includes Jonathan Hammond (Ragtime) as Michael; Christopher Innvar (110 in the Shade, Floyd Collins) as Larry; Kevin Isola (Brooklyn Boy) as Alan; Jon Levenson (Irish Rep's The Hairy Ape) as Harold; Kevyn Morrow (Olivier nomination for Ragtime, First Wives Club) as Bernard; Graham Rowat (LoveMusik, Guys and Dolls) as Hank; Aaron Sharff as Cowboy; John Wellmann (TG's cul-de-sac) as Emory; and Nick Westrate (A Moon for the Misbegotten) as Donald.

Tickets, which are $38-$45, are available at www.transportgroup.org or by phoning TheaterMania at (866) 811-4111 or (212) 352-3101.

For more information about Transport Group and The Boys in the Band, visit www.transportgroup.org.