No need for special precautions except for drinks: NEVER NEVER NEVER leave you drink unattended. Someone might put drug in it and steal your things, this is called “good night Cinderella”, and it can be a horrible experience to go through. It is more frequent in homosexual bars but it can happen in other places too . So, if you go to a nightclub (restaurants are safe), it is wiser to drink BEFORE you go and not have anything while you are there.