Alternatives to prague?

6 of us going on a 21st birthday pissup weekend. looking to stay for 3 nights for under £200 including flights and accomdation. prague was mentioned but was wondering if anyone has any alternatives to prague?? i hear the beer is not that cheap compared to the uk anymore.
Answer
I would not want to help inflict british rowdies/binge-ers on any foreign destination. the country is being shamed. anyway, if you save the cost of travelling, you can afford to pay any price for beer.