What is the ruling on working in a coffee shop that combines permissible and forbidden things, such as argileh (hookah) and music, and what is the ruling on preparing and serving food to its workers?

Working in a café that involves forbidden acts, if it entails direct participation in them or assisting in them, is forbidden. However, if the work is restricted to permissible matters and does not involve assisting in forbidden acts, then it is permissible. Preparing and serving halal food to workers in the café is not blameworthy.