“The two showed up around 10:45 p.m. through the back entrance with a group of friends and were holding hands at different points throughout the night," the New York Daily News quoted a source as telling the magazine. After spending the night dancing along with actress Brittany Snow, an onlooker told People.com that the two began 'canoodling" at a table.
“Zac sat in between her legs and she wrapped her arms around him," said the onlooker. “They were making out on and off for the last hour or so until closing. They acted like there was no one else in the room," he added.