January 26, 2006 -- ADRIAN Grenier is cutting quite a swath through the Sundance Film Festival. First, the swarthy "Entourage" stud came to the aid of a publicist who passed out from "altitude sickness" at a boozy house party, and now comes word that he enjoyed a threesome with two lovely ladies from the pop-culture Web site doubleagent.com. Grenier met the women Tuesday while perusing the sexy goodies at the Booty Suite in the Canyons Hotel, which gave out sex toys and lingerie. Our spy said, "Adrian grabbed the bonding tape, vibrating couples ring, and the beaded blindfold and left with the two girls. One of the girls came back [yesterday] and said they had put the toys to good use that night and had a threesome." A manager for Grenier didn't return calls. Meanwhile, goodie-grubbing Justin Timberlake tried to score two pairs of $30,000 platinum and diamond aviator sunglasses at the Spin Shoppe in Park City. He tried on one pair and asked, "Do these look good with my hair? They'll look good with my camo ski gear," before trying to take another free pair for girlfriend Cameron Diaz. He was turned down and left with only one pair.