It's usually on the At Sea Day at 2ish. Last time it was in Cadillac's. If I remember correctly there were 2 tasting margaritas and 3-4 baby shots- Patron, Don Julio, 1800, "mystery" and a bonus of Patron Cafe. And an accessory plate with salt, lemon, lime, and orange.
Just stop at Guest Services and they can tell you. I'm hoping for a different time though cause our Twilight meet is 2:30.