It happened around 3:00 a.m. Wednesday at Saint Gabriel's Lodge at 525 Jefferson Street in Stowe, Pa.
Investigators say the suspect entered the building off of Grosstown Road and forced an employee to retrieve an undetermined amount of cash.
The suspect threatened the employee's life during the holdup, police said.
The man then left the building on foot on Grosstown Road toward Monroe Street.
The suspect is described as being in his mid 40's and approximately 6' tall, 250 pounds with long brown hair in a pony tail. He also has a tattoo on his right forearm. The suspect was missing teeth, wearing a dark blue or black t-shirt and jeans.
Anyone with information in regards to this incident and or the identity of the suspect should contact the West Pottsgrove Police Department at (610) 323-2090.