Just stay alert, go with the flow and feel free to use your horn as liberally as everyone else. If you are found without proper I.D. you will go to jail and the bar will be closed and heavily fined. Bring your driver's license, military ID or passport for accepted forms of identification. There are several automatic teller machines located within easy walking distance of the hotel. Most major ATM symbols and credit cards are accepted.
Machines usually have bilingual instructions and cash is dispensed in pesos.
Your bank may charge you a couple of dollars for an international withdraw. American Express, MasterCard and VISA are accepted throughout Festival. Many other businesses around town accept credit cards as well. No police officer is ever authorized to accept money. Don't offer, and they should not ask.