Who says athletes don’t know how to dress? Celtics players looked snazzy at Thursday’s fund-raiser for Boston Children’s Hospital, held at the Gucci boutique on Boylston Street. Decked out in stylish Gucci get-ups, you’d never know Jeff Green, Brandon Bass, Kelly Olynyk, and Courtney Lee play basketball for a living. (OK, maybe you would.). Unlike his teammate Rajon Rondo, who’s a dedicated follower of fashion, Olynyk said he doesn’t pay much attention to what he wears. “I wouldn’t say I’m a huge fashionista guy,” he told us. “I like different types of clothes and looks. Everyone has their own style.” Because he looks like a young Bill Walton, we wondered if maybe Olynyk is a hippie. “I wouldn’t call myself that, no,” he said, laughing. “I put a round ball in a round hoop. We have that in common.”Mark Shanahan can be reached at firstname.lastname@example.org. Follow him on Twitter @MarkAShanahan. Meredith Goldstein can be reached at email@example.com. Follow her on Twitter @MeredithGoldste.