As long as were talking tipping. Throughout the year I put money from various sources in my "tip" can. I use this for tip money in Jamaica. I usually wind up with ~$200.00. A few 10's, more 5's, a lot of 1's. I use them for bartenders, maids, porters, wait staff, etc...
I've never given much consideration as to whether U.S. is harder to use for them. Would They prefer to be tipped in Ja dollars? I know U.S. is widely accepted but would the workers rather have Ja dollars?