This one is closed, I'll just place it here in case it might get its license back (which I doubt really).
Vrankrijk, Spuistraat 216 . The most well-known and permanent squat café in Amsterdam has been a fixture on Spuistraat for over eighteen years. You have to ring at the door to be let in (the black door on the right with a single buzzer, please don't bother the people living in the building at the yellow-and-black checkered door on the left!). Once inside, you will find a super-cozy bar with an all-volunteer staff and the best prices in the inner city. All profits go to support various good causes. Open every night of the week, special nights are Monday night: queer night; Tuesday night: fancy cocktails to support refugees; Saturday night: dance night, the café's cavernous disco hall is opened for a mix of 80s, ska, and new wave; Sunday night: film night. Sunday through Thursday: 9PM - 1AM; Friday and Saturday: 10PM - 3AM. The place is unavailable for the time being, as the municipality indefinitely revoked the license!