The first happened around 1a.m. Saturday along the 200 block of North 12th street.
A victim inside said three men entered the business and robbed it at gunpoint. They stole about $100 before fleeing the scene.
About three hours later, at 4a.m. a massage parlor was robbed along the 100 block of North 10th Street.
Once again, police say three men and a woman entered the business armed with guns. Officers said they got away with $10,000 and several cell phones in this robbery.
Central detectives are investigating similar robberies in the area.