Penndel police say about five people were being disruptive at Penndel Bowling Center just after midnight Sunday.
When one of the managers asked the group to leave, the group ganged up on that manager and assaulted him before fleeing in an SUV, according to police.
Authorities are checking surveillance cameras for the group involved in the incident.
There was no immediate word on the condition of the victim.
Anyone with any information is asked to call the Penndel Borough Police Department.