The core activity of Tatanka is focused on gastronomy and the sale of local specialties, particularly during the Montreux Christmas market. The company offers various services, including a famous fondue, saucissons, meat and cheese platters, and beverages. It operates several bars and stands, offers private chalets for celebrations and events, and sells local products such as saucissons and cheese. Tatanka's core activity is centered on providing culinary experiences and local specialties in a festive atmosphere.