Thousands of Princeton University alumni return to the area to attend reunion weekend, three days of partying that features the Saturday afternoon P-rade, where alumni parade by class and sometimes deck themselves out in themed costumes.

This summer, seven of the alumni will be back in the area to face drunken driving charges in municipal court.

Police and prosecutors say it's been happening for years. The reunion weekend draws up to 20,000 people to the campus, there's a lot of partying, and the odds are that some will end up in handcuffs after getting behind the wheel DUI.

They put on extra officers every year for the reunions, which traditionally start on a Thursday and run through Saturday night. One team of officers is especially looking for the signs of drinking and drunk driving.

Police take no pleasure in locking up someone attending the reunions, which he said for the most part, is a great event for the borough and the university.

However, none of the arrests at the recent alumni weekend, May 31 to June 2, involved crashes.

In all, the seven comprise two corporate vice presidents, two managing directors, a partner at a law firm, and two men in their 70s who were in town for their 50th reunion.