Night Life of the Gods.

A scientist named Hunter Hawk invents a device that can turn flesh to stone. While celebrating his discovery he becomes involved with a half naked leprechaun. On a trip to New York, Hunter and Meg (the leprechaun) decide to go to the Metropolitan Museum of Art and turn all of the Statues of Greek Gods into people. What follows in a drunken romp around New York with Medusa's severed head still in Perseus' hand.