WATCH: Elizabeth Banks & James Corden Give Lapdance to Jane Fonda & Lily Tomlin

Grace and Frankie's Jane Fonda and Lily Tomlin sat down with The Late Late Show's James Corden and guest Elizabeth Banks. Rumor has it, said Corden, that Jane throws some legendary house parties where the only rule is: DANCE.

Though Lily has apparently never been to one of these shindigs --

Liz has, though as a plus one. To gain an official invite, she and James take it to the dancefloor to prove their worth. Liz started out by making a deposit with the Banks Drop -- Jane approved.

But James was not to be outdone and busted out that drunken wedding party staple, The Running Man.

Don't sleep on him 'cause James Corden got some moves.

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And then things got all kinds of sexy when James and Liz asked the septuagenarian icons: Hey baby, you want me? Well you can get this lapdance here. For. Free.

Jane wasn't mad at it. And why should she be?

That James Corden's not just workin' 9 to 5 -- he's workin' overtime. Check out the late late dance party below:

Les Fabian Brathwaite -- waiting for my invite and season 2 of Grace and Frankie.