Last night, and for one night only, fashion illustrator Richard Haines showed a collection of sketches at Envoy Enterprises on Chrystie Street. The exhibition, “The Line of Beauty,” featured hundreds of drawings of hip rocker boys and chic men-about-town. Haines, who sketches stylish men he sees on the street, has recently worked on ads for the J.Crew Men’s Shop and his drawings have appeared in their Soho windows. In addition to his well-dressed gents, Haines’s show also included a full wall of boys in their skivvies. “A surprising number of people like to pose in their underwear,” Haines explained. “I like doing those drawings because in the couple of hours it takes to sketch someone, we chat and I really get to know their story. That’s one of the most fun parts for me.” If you missed the show last night, which was part of Envoy’s One Day Series, check out Haines’s website, Designerman-Whatisawtoday.Blogspot.com, where he adds a new sketch almost every day.