Great tip, thanks!
I prefer Shamrock for picking up drinks and other supplies, much more selection than Mikey's across from Coco. Good prices too, unless they're wanting to go all the way downtown. I walk the beach to Alfred's then cut through to the road, just across the street and down towards town a bit from there. He (John) also sells freshly squeezed oj (if they miss the juice guy on the beach). Nice man, I enjoy giving him my business.
When mentioning to get change at the front desk, specify lots of 100s. Those 100s run through my fingers like crazy everyday, as I use them the most. (maybe moreso as a single buying one drink, etc.) But with tipping housekeeping everyday, short taxi rides, etc., they go fast!