I'd recommend NOT using your credit card at an AMP. These places are often fronted by organized crime, who are well known for breaking the law with money laundering, credit card skimming, identity, and straight up theft. Not worth the risk to give them your name and any personal data. Cash only, and only carry as much cash as you can afford to part with. Not bringing your wallet would not be a terrible idea. Even the less sketchy ones can have strong ties to the criminal underground. Exercise caution.