Zac Efron enjoyed a wild night of drinking in Vancouver last week.

The normally clean cut High School Musical actor shocked onlookers by chugging down a variety of alcoholic beverages during an evening out with friends at Canadian night spot Opus Bar.

A source told spywitnesses for FOX411: “They were all about partying. They were downing one Bitter Cherry Salome Sour after another, until they moved on to super strong Belvedere vodka and sodas. They looked like they were really celebrating!”

Zac has previously claimed he tries to keep his partying in check because he does not want it to interfere with his career.

“There’s a time for celebration and I partake, sure. But, you know, it’s important not to let that become too big of a distraction. The more you have access to, the harder it is to remain focused,” the star once said.