Der KofferRaum

This bar has an awesome classy and friendly atmosphere (yes it is possible to have both). While the drinks are slightly more expensive than in other places, the service is great, the range of drinks available is huge and there are freebies like cucumber-lemon water, peanuts and great staff.
Definitely recommend it :)

Unfortunately nothing for students, because its a tad too expensive, but great, if you have some money to invest into great cocktails! A+ for the Cocktails (and that strange cucumber-flavored water... it's nice, but strange), but a straight C for the prices