When traveling you (mostly) live cheaply but sometimes you need to treat yourself to a good cocktail! The two cocktail bars on the Pannekoekstraat are good places to start a night out and they serve super cocktails!
Try the world famous pornstar martini in Level. They have over 50 cocktails on their menu and the staff is very friendly. The location is really nice and usually draws a mix of business people and students with some money to spare. As long as you are splurging, Level also serves great food!
Or if you prefer try one of the great mojitos at Soho. Soho is small inside but it boasts the best terrace in town. No chairs and tables here, just lounging like it should be. In winter the terrace is heated and blankets and pillows are provided too. This is the best place to go if you really need to relax after a long day!