Published: Apr 06, 2010 10:52 PM EDT

NORTH NAPLES, Fla. - Stefano Cavinato says he does not understand why a customer would come forward 3 months later, and claim she was drugged at his restaurant, Piola.

"At first we were a little surprised. We don't know what happened in late December. We serve only beer and wine, and we train our staff well on watching food and drinks. I am not sure that anything really happened," said Cavinato.

Customers have filed about 50 complaints about Cavinato's neighbor, Blue Martini. They say they were drugged at the local hotspot. Both places are located in the Mercato shopping plaza in North Naples.

"We are cooperating with the authorities. Hopefully they will let us know when they find out, what really happened,"

Cavinato told WINK News. So far, nobody has been arrested in connection with any alleged drugging of customers. Toxicology reports on three 'victims' showed, they all were legally drunk.