Sgt. Mark McCoy said the men entered the business, at 1219 Cooper Foster, about 7:40 p.m.
One of them displayed a black semi-automatic handgun, he said.
The men took the cash drawer and removed the money from it, McCoy said. They also stole $74 from a man who was cashing in his winnings, according to a police report.
He said an alarm then sounded, and the men fled.
According to McCoy, no arrests have yet been made, and police do not have any suspects.