More skinny on Johniston

We got some more details of Jennifer Aniston and John Mayer's little hang-out session the other day. Apparently, they left the Sunset Tower Hotel in L.A. separately and met up at a restaurant for some chicken salad and wine. From there, they hit up Jen's Hollywood pad and "hung out" until John finally left at midnight.

An insider tells us that they're not officially together, but they aren't apart, either. Which means they're playing "just the tip" for a bit before they either decide to get back together or split up for good. I envy him.