I just spent 25 energy wandering around inside the happy hour with seven crates of eclipse in my inventory, on the Dr. Thomas quest, having given eclipse to Hawk, and never saw the Slick Third Eye. I had already supplied the Third Eye. Maybe you have to play pool?
I just got it while looking for the happy art student, and I wasn't etheric. I had just sold eclipse to the girl in the VIP room; maybe you must have given it to her, or maybe you have to have progressed a certain amount in the Dr. Thomas quest?
Just after selling to the Third Eye: So far you've shared with a bum in Southside, an ex-Fang in the sewers, a Dock security guard, a dockhand, a raver at the Happy Hour, a Third Eye in the Happy Hour, a college student, Carlos, and Hawk.
I just got this encounter, never joined up with Hawk (I haven't even gotten the drunk third eye encounter yet). I did give it to the raver girl, which might be the unlock.
After selling him a crate, I had:
So far you've shared with an ex-Fang in the sewers, a Dock security guard, a dockhand, a raver at the Happy Hour, a Third Eye in the Happy Hour, and Carlos.
I spent a lot of time on the dance floor trying to find the Drunk Third Eye and never ran into this encounter. Sold a crate to the raver chick in the VIP Room and got it almost immediately after I went back downstairs. So I think that's the unlock. I had not yet even had the opportunity to try and join the Third Eye yet, let alone meet Hawk.