Both B2 and C1 levels offer classes with Textbook + conversation or full conversation classes.

B2 Level 401 to 409

Can understands the main ideas of complex text on both concrete and abstract topics, including technical discussions in your field of specialization. Can interact with a degree of fluency and spontaneity that makes regular interaction with native speakers quite possible without strain for either party. Can produce clear, detailed text on a wide range of subjects and explain a viewpoint on a topical issue giving the advantages and disadvantages of various options.

C2 Level 501 to 509-

Can understands a wide range of demanding, longer texts, and recognizes implicit meaning.Can express yourself fluently and spontaneously without much obvious searching for expressions. Can use language flexibly and effectively for social, academic and professional purposes. Can produce clear, well-structured, detailed text on complex subjects, showing controlled use of organizational patterns, connectors and cohesive devices.