LAS VEGAS—It was as simple as flashing a badge and you gained entry into one of the hottest spots in Las Vegas.

Attendees of the 2011 AVN Adult Entertainment Expo ended the first day the right way, by partying it up until the wee hours of the morning at Tao in the Venetian in Las Vegas.

The tree-level venue packed in the crowd, as girls from some of the biggest studios—including Jessica Drake, Kaylani Lei and Alektra Blue from Wicked Studios, and even director Brad Armstrong—were in attendance. Mainstream artist 50 Cent was spotted in the crowds and people dined, drank and danced the night away.

The event was the official welcome party of the 2011 AVN Adult Entertainment Expo, which runs through Sunday at the Sands Expo Center in Las Vegas. AEE is the biggest show of its kind, where fans and industry members alike can mix and mingle with the stars of adult stars and manufacturers and creators of everything from websites to DVDs to adult toys and novelties.