If you're looking for an event where you don't have to use a credit card I can recommend the Gulaschprogrammiernacht in Karlsruhe. It has a similar vibe and is

If you're looking for an event where you don't have to use a credit card I can recommend the Gulaschprogrammiernacht in Karlsruhe. It has a similar vibe and is funded entirely by donations and the sale of goulash.