Photo: Wikimedia CommonsA Cologne institution in the student quarter, Bei Oma Kleinmann has been serving enormous, crisp schnitzels in every imaginable variation since the 1970s, in a cosy, graffiti-signed dining room. Queues form and it is cash-friendly and convivial. Book ahead or arrive early, come hungry for one of the huge schnitzels, and expect to share tables and stories with strangers.