More than 600 guests got the chance to see “Dancing With the Stars” personality Mark Ballas (above right) move to the beat at AdMeTech Foundation’s “Dance for a Cure” at the Westin on Saturday night. Co-sponsored by Arthur Murray International, the benefit for prostate cancer research drew “Dancing With the Stars” talent Anna Trebunskaya, who’s been paired with Chuck Liddell and Drew Lachey; Jonathan Roberts, who’s danced with Macy Gray and Marie Osmond; and Louis van Amstel, who came in third in season 9 when he danced with Kelly Osbourne. Also at the event were dance champion and “Dancing With the Stars” choreographer Nick Kosovich (left) and WCVB-TV’s Susan Wornick, the night’s emcees. Worth noting: Ballas also sang at the event, but he didn’t seem very happy with his performance. “Flying home from what was probably the worst sounding gig I have ever played,” he tweeted to fans on Sunday.