Key brings hard-to-find designers like Diane Medak, Guy Baxter, and Corey Lynn Calter together under one roof (41 Grand St., nr. Thompson St.; 212-334-5707). Suits are funky but work-appropriate, and there will be a resort collection in November. From September 27 through October 21, Self magazine’s Self Center (461 Fifth Ave., at 40th St.; 212-286-2878) will offer spa treatments, free blowouts, and fashion. Proceeds go to breast-cancer research. And Emerge nyc (65 Bleecker St., nr. Broadway; 212-358-0255) showcases up-and-coming designers alongside established names. Expect to see everything from hand-sculpted jewelry by DeDeMetal to beauty products from Korres.