These days Robert Geller, a New York-based menswear designer, is busier than ever, which is just the way he likes it. Besides his successful eponymous line and a collaboration with Levi’s, Geller is launching a new retail venture, called Key Shop. The temporary store, a partnership between Geller and Greg Armas, the owner of the eclectic Lower East Side boutique Assembly, will feature a carefully edited selection of Geller’s products, many exclusive to the store.
 Geller has quietly become a fashion fixture of the downtown scene, his slim and pale dandy aesthetic fitting well with skinny dudes of unspecified occupations that roam the streets below Houston and well east of Broadway. “I feel that the Lower East side is where the Robert Geller guy likes to be,” wrote Geller in an email message. “The area has a lot of stores and restaurants popping up, and is still developing nicely. The guys (and girls) there get our aesthetic and will understand the store. I feel like it is the most exciting area of New York right now.”
 So, if you want your key (get it?!) Geller items, like a poncho made of cupro and cotton and suede ankle boots, they will be waiting for you at 129 Rivington St., but only until April 15, when the temporary shop will close its doors.