Aniston and Mayer: Friends with Benefits

5/11/2008 12:20 PM PDT

Aniston and Mayer: Friends with Benefits

So if there's any doubt he's shagging her, it's now case closed.

John Mayer and Jennifer Aniston worked out at a Miami hotel gym yesterday, then worked it out by themselves. Check out the photos -- we're satisfied with the proof. They're clearly satisfied, too.