The crime spree lasted just 90 minutes and began around 9:30 p.m. at a taco stand near Vernon Avenue and McKinley, police said.
The gunmen moved over to a taco stand on 51st and Ascot Avenue and then to 51st and Avalon.
It all ended around 11 p.m. at a taco stand at 43rd Street and South Central.
During all the robberies, the victims reported that three suspects pointed guns at them; sometimes they pointed a gun to their chest, other times to their head.
Raul, who works at one of the taco stands, told FOX 11 that the gunmen held up a gun to the chest of one of his coworkers. He also said the robbers pointed a gun to a customer's head. That customer only had a cell phone with him, which they took and threw on the ground.
The suspects were described as young men about 5 feet 6 inches to 5 feet 8 inches tall, who wore blue hooded sweatshirts or jackets.
The suspects may have fled in a gray Honda.
No injuries were reported.
It was unknown if the crimes were related to other recent taco stand robberies. Anyone with information on the case was urged to call 877-LAPD-247.