Open Ground is a nightclub built inside a former underground bunker in Wuppertal, Germany, developed over seven years with sound quality and the dancefloor experience as the primary design drivers.

Committed to originality, independence and expanding horizons, Open Ground invites everyone to join with an open mind, whoever they are, whatever their background, and share a great experience of sound-system music in an inclusive, respectful club environment.

Callshop Radio has had the honour of hosting the Annex floor on three occasions.