Kokomo Beachclub
One of the biggest clubs in Groningen. On Thursday's it's packed with students 10 beers for €10. Plays great dance music in weekends and serves fine cocktails.
De Kosterij
In a corner of the grote markt, next to the martinitoren, (http://www.kroegpagina.nl...). family style. nice terrace in summertime.
Vera
Self-proclaimed club for the international pop underground and indeed there are good concerts and parties, check out their site (http://www.vera-groningen.nl/). nirvana played here before they were big, still the pride of groningen. local high school crowd doesn't bother to turn up until 3 am for parties at saturday nights. entrance €1/month.
De Spieghel
Jazz pub in the peperstraat with free and usually good live performances at most evenings starting around eleven o'clock. from sunday until wednesday performances are on the second level, which is a smaller, cosier bar and it gives you a more intimate performance. from thursday until saturday all performances are downstairs, which is a larger bar with a stage and the performances tend to be bigger larger band. relaxed atmosphere any evening. guests who are at the bar downstairs may even choose the upcoming music from the jukebox.
De Drie Gezusters
De Drie Gezusters, Three Sisters. On the Grote Markt, (http://www.driegezustersg...). Possibly the largest bar in the Netherlands as well as in Europe. Many bars connected in a mazelike fashion; has several facades on the Grote Markt that look like separate bars, but don't let that deceive you.
Het Feithhuis
Next to the martini tower, (http://www.feithhuis.nl/). "liberal" atmosphere. a good place to have lunch.
Groningen's reputation as university town is borne out in its nightlife, which is comprehensive, with numerous options for drinking and clubbing. There are also several places to play pool/billiards. Most bars have the standard Dutch beers, but more and more international, especially Belgian, beers are beginning to have a presence. Bars in the down town area do not have fixed closing hours. Theoretically they can stay open for 24 hours a day, which a few bars do.
Big parties usually with electronic music in the whole Netherlands can be found listed on Partyflock in Dutch. (http://partyflock.nl/party/)
Coffeeshops
Medley
A good cheap coffee shop, where at least Dutch & Arabic are spoken by the staff. I managed with English too just enough to get what I needed. This is just a pick up coffee shop. Can't smoke inside or stay there but it's quite cheap. Joints for €3,00 also many kinds of hash maroc, afgan..for about €5-€6 & weed/wiet: powerplant, sneeuwwitje snow white, afgaan afghan 6, 10 or 20 euros.