The nightlife/entertainment areas have a lot of activity and are generally very safe, however pickpockets are a problem, especially on Walking Street when it's crowded, despite the official Tourist Police patrolling the area at night. For this reason, a visitor should not carry a passport and/or credit card with them, especially at night. These should be left in the safe at your hotel along with the bulk of your cash, or if they must be carried then they should be securely concealed. If you have been pick pocketed and then you actually spot the likely pickpocket departing, do not follow. You could be mistaken, and you almost certainly will be accused of being mistaken. Just put it down to experience, and leave the immediate area.