Someone in an earlier post mentioned taking US dollar coins for tipping on the LatinPass run. I took 20 coins on my trip to Peru and Ecuador and these were greatly appreciated. I recommend it. I used the coins exclusively for tips and it made it easier than trying to keep paper dollars handy or try and figure out the correct amount of local currency. Most people had never seen one and several times I saw people gather around the recipient to check out the gold coin.