Acclaimed physicist Stephen Hawking, who is confined to a wheelchair by Lou Gehrig's disease and uses a computer to speak, has been spotted several times getting lap dances at a California sex club.

According to a source who has been a member of Freedom Acres swingers club for nearly half a decade, Hawking, 70, shows up to Devore with a bevy of nurses and assistants and has naked woman grind on him.

"I have seen Stephen Hawking at the club more than a handful of times," the source told Radar Online.

He arrives with an entourage of nurses and assistants. Last time I saw him he was in the back 'play area' laying on a bed fully clothed with two naked women gyrating all over him."

The source added that Hawking has his staff stand nearby watching while he's with the women.

"I have spoken to him on several occasions and have even shared drinks with people in his group. And he'll even take photos with people in the club as long as it's in a neutral area," the source said.

" Stephen is by far the last person I ever expected to see in this club," the source added.