Not sure if the Cancun hotel has this drink on the menu...the Guacamole. We had it at the Cabo hotel and it was scrumptiously delicious. Had nothing to do with avocados...just a green drink with ninja skills to sneak up on you and kick your ass. Need to switch to beach drinks now that it's getting warmer...
The only thing I remember is gin...and some other shit that makes it green and awesome. I emailed the hotel down there to see if they would share...
I remember it from last year at the Cabo resort. It was Gin, some type of juice or sweet -n-sour, and I think creme de menthe. It was tasty and you can barely taste the gin (good since I am not a fan of gin). I did see some people asking for vodka in it also, but thinking that would put me over the the mixing those two liquors. Good luck with trials in making it. I would bet they can make something similar in Cancun.
Ooooo...we hope that's it. We don't mind trying a dozen or so on day 1 just to be sure...just for scientific purposes, not as a social lubricant.