Mix Brussels --Gym & Wellness for adults only-- is a four-star hotel in Brussels, Belgium. Located at 25 Boulevard du Souverain, this adults-only retreat sits about 4.7mi from the city center, offering easy access to the capital while maintaining a wellness-forward vibe.

Highlights include Spa/Wellness packages, an indoor swimming pool (free), an outdoor swimming pool (free), a restaurant, and free Wifi. Fitness enthusiasts will find a free fitness center and the option of a personal trainer. Additional conveniences include a 24-hour front desk, non-smoking rooms, wheelchair accessibility, air conditioning, soundproof rooms, a bathtub with free toiletries, plus a terrace, garden, elevator, and beach umbrellas and chairs for sunny days.

With 4,615 reviews, guests frequently praise the wellness facilities and the thoughtful details that make stays comfortable and easy.

Wellness stays front and center, inviting travelers to tailor a day of relaxation with Spa/Wellness packages. Both the indoor and outdoor pools are heated and open year-round, offering a refreshing dip in any season. Complimentary Wi-Fi keeps connections seamless between spa sessions and workouts, while a free fitness center and the option of a personal trainer help shape a personalized routine. A 24-hour front desk provides friendly, around-the-clock assistance, and rooms enjoy air conditioning and soundproofing for peaceful nights.

On-site dining adds a convenient flavor to every stay. Joule, a day eatery and coffee spot, serves local, international, and European cuisines in a modern setting. Timber is adults-only with a modern ambiance, offering Australian and French influences with grill and BBQ highlights. For outdoor moments, terrace and garden spaces provide relaxed spots to linger and soak in the atmosphere.

Practical touches round out the experience, including an elevator and beach umbrellas and chairs for sunlit days by the outdoor spaces. Non-smoking rooms contribute to a comfortable, smoke-free environment throughout the stay. With these thoughtful details and a four-star standard, this Brussels retreat offers a lively wellness-forward base for exploring the city while enjoying easy, enjoyable downtime.