I decided to try to maintain a comprehensive list of all the jam sessions in Utrecht, since it seems to be sorely lacking (something I have noticed traveling around the world is hardly unique here). Please double check the venue using the link as not all sessions are weekly. Enjoy and jam out!
MONDAY
TUESDAY
Het Oude Pothuys – Jam session
Café Averechts – Open Mic
Open Mic in the Griftpark (good weather in summertime only) – link
WEDNESDAY
Cafe Domkop – Jampot
Moira – Open Mic
THURSDAY Het Oude Pothuys – Jam session
De Kargadoor – Jam session (jazz)
FRIDAY
SATURDAY
Cafe Domkop – Jampot
SUNDAY
Café Tilt – Jazz jam session (alternates weekly between jam and concert)
Badabing – Sunday Session
Het Oude Pothuys – Open Mic
Café Kleine Max – Jam session