Mini-marts and gas stations are popular places for customers to get late-night items like food or drinks.
Now, some late-night workers fear criminals are also looking at these shops as places to score some quick cash.
In Waipahu at Tammy's Polynesian Market, there is the usual steady stream of customers on Wednesday night.
After numerous robberies of mini-marts in Leeward Oahu, Steve Kim worries that along with the customers, criminals could also walk into his market.
"I'm very worried about it. This morning when I saw the TV, it was a big surprise. It happened right across from my store," said Kim.
The Aloha Island Mart located across Farrington Highway was the scene of an armed robbery early in the morning.
It was one of two robberies that happened Tuesday night. In each instance, the suspect used a gun to get cash from a convenience store.
The other robbery took place at a Tesoro gas station in Salt Lake.
The latest robberies are just part of a crime spree against mini-marts and gas stations with a half dozen taking place in the past month.
Many of these robberies have been rash because in most instances, the criminals have been caught on surveillance cameras.
Kim said he also has security cameras. He added his market has been lucky so far, because it is usually busy and he knows many of his customers, but he worries about what will happen in the future.
"I have had this business for 30 years in Waipahu and we've never been robbed. I don't know why the crimes are getting worse, because before it wasn't like that," said Kim.
Honolulu police officers are investigating whether the latest robberies were committed by the same suspect, because of similarities in the crimes and fact that they happened right after each other.