I think it's "time to live, time to die." He also "played" a version of Nighttime Is Great, but this was mainly just him plunking around on his guitar to an iPhone recording. Really strange set, the vast majority of the crowd left well before he finished.
Hahaha sounds like a great time. were there any other songs we know?
I think it was just Nighttime Is Great (which I love) and the "time to live, time to die" one. The rest of the set was Ariel trying to play guitar while Doctor Cantaloupe messed around with some analog effects. Ariel abruptly picked up his phone and played both songs straight from it out of nowhere. I would say MAYBE 25% of people made it through the set.
He was practicing guitar off by himself for a couple hours before the set, I had been kinda hoping for something along the lines of the Helen solo excerpt on the Eric Andre show. Always surprised at his inability to play guitar live at all, considering how genius those early guitar-based albums are.