Cheap night out or budget running low? Trippist found these cheap beer hang outs:

Café Krater (part of the University of Amsterdam)
Where: Roetersstraat 13

Eurocafe Menschen - all day beer for €1!!
Where: Amstel 202

Café de Gieter
Where: Korte Leidsedwarsstraat 179

The Pirates
Where: Korte Leidsedwarsstraat 129