We brought plenty of US $1's and $5's for tipping. We also exchanged several hundred US to JA every couple of days and when we went out one of us would carry JA and the other US$. Typically we would carry more JA than US though. I'm going to estimate the 2 of us spent about $100 a day on food, drinks taxis and tips but we are not big eaters. If I had to break it down a typical day looked something like this for us:
Breakfast - $20
Afternoon drinks - $30
Afternoon snack $5
Evening drinks $30
Dinner $20
Transportation - $10
We didn't always have breakfast and kept our room fairly stocked with snacks which we would use to hold us over during our drinking sessions. If we didn't have breakfast typically we would have a bigger dinner. The breakdown may have changed day to day but I'd be willing to bet the overall total was still fairly consistent except for the day we stayed in to nurse my hangover and the day we went to the beach but these two days probably offset each other.
Beth Ann might be able to confirm or correct my estimates