The resort has changed their policy, and this hour-long class (9 a.m.-10 a.m.) is available for a fee. Registration is required through the link below. The fitness center equipment is available to Interlaken guests free of charge at any other time.
While the Interlaken Inn has a variety of things to do, most of which are included (canoeing, kayaking, tennis and pickleball courts, basketball half-court, pool table, ping pong, air hockey, lawn games, movie screening room, fitness center, and on-site massages), they also have a list of suggestions of things to do beyond the resort (horseback riding, hiking & biking trails, adventure park, golf courses, fishing, boat rentals, auto racing, wineries, stand-up paddle boarding, antiquing, etc.) on their website below.