Only one day hey, can't you do two days? I'd go to Sharks if I was you, brown skin wont matter, as long as you got a few brown 50€ notes in your wallet, money, if you got time go to a decent exchange in Frankfurt, I doubt you'll get a better rate in US, some US bank accounts allow you to withdraw overseas without charges, check if that is the case, as ATM's will give you the Visa exchange rate which is usually good. As for the girls, don't walk in the club with your eyes on stalks in shock, don't say this is your first time, if you've already read the reports on here you'll have a good idea how it works, don't take the first girl who attaches herself to you.