The robbery took place at 11:36 p.m. on Louis Avenue.
Police said as the couple exited their car a man, armed with a black handgun, approached the man and demanded cash.
As the man's wife ran to the house, police said the gunman pointed his gun at the man - and took his cash from his wallet and fled the scene.
No one was injured.
Police said the gunman wore khaki pants, a black and black baseball cap, a short black coat and a black handkerchief that covered his nose and mouth.
Detectives are asking anyone with information to contact Crime Stoppers at 800-244-TIPS. All calls will remain anonymous.