A worker at a so-called relaxation studio in East Greenwich was charged with prostitution.
Police said they discovered online posts offering more than massages.
Police arrested 33-year-old Tiffany Burgess, who was working on behalf of The Blissful Oak on Main Street.
"The tips were from individuals who had some inside knowledge about the place and the services that were being performed inside," said Jon Chirnside of the East Greenwich police.
The services weren't legal.
"We sent an undercover officer in yesterday afternoon. He was propositioned by Miss Burgess. He declined her services. He left the facility. We met with him outside and then we went back inside," Chirnside said.
Police said the guest book showed five names. They said they think the business had been open for a few months.
NBC 10 found it listed on the Backpage website amongst others. Police said most of the cars that came and went from the location had out-of-state plates, predominately Massachusetts and Connecticut.
Police said they don't expect to make any other arrests.
Police did contact the owner.
"She did state to us that all of the girls that work there are independent contractors. They do sign a contract that sexual services will not be offered. Whether or not this girl just didn't comply with that or if it was just an accepted practice, I can't indicate at this point," Chirnside said.
No one in neighboring businesses wanted to comment on camera.
NBC 10 sought a comment Burgess at the address listed as her home. No one answered the door.