Ryan Keely threw a toga party at La Pomme and dressed herself, barely, as Aphrodite because, as the Penthouse Pet explained to us, “You should celebrate your birthday in as close to your birthday suit as possible.” Keely, 25 — whose guests included Manhattan madam Kristin Davis, VH1’s Anju McIntyre, and Guns N’ Roses’ Ron “Bumblefoot” Thal — conducts her first “Porn Star Sex Life” self-improvement seminar Saturday at Velour Lounge on 10th Avenue with Jade Vixen and Justine Joli. “Bad sex is terrible,” Keely says.