Use the following trick to get the clothes from the pizza boy without him telling anyone. Wait at the restroom on the left of the map in the fourth stall. Wait for the pizza delivery boy to arrive and use five bottles of Anesthetic on him. Do not take his clothes. Go to the room with the sign "Food Delivery" unnoticed by guards. If guard appears, hide close to the wall and he will go away. Before the delivery boy tells you "Cannot go--- you no access la", equip the Anesthetic and use two bottles on him. Then, take his clothes and wait for him to get up.