The Brenzhotel Heidenheim offers a variety of room types. They have Family Rooms that can accommodate up to 4 adults with 2 twin beds and 1 queen-size bed. Twin Rooms are available for 2 adults with 2 twin beds, while Triple Rooms can accommodate 3 adults with either 1 twin bed and 1 queen-size bed or 3 twin beds. Double Rooms are designed for 2 adults with 1 queen-size bed, and Single Rooms are available for solo travelers with 1 twin bed. Smoking is not allowed in any of the rooms.

From the provided data, the featured amenities of the Brenzhotel Heidenheim are not listed. Therefore, it is unclear what specific leisure amenities are available at the hotel.

However, guests can still make the most of their time at the hotel by enjoying various activities and amenities. They can explore the nearby attractions such as the Hellenstein Castle and the Brenz River, which can provide opportunities for leisurely walks or hikes.

Additionally, guests can dine at the hotel's restaurant and enjoy delicious meals. They may also take advantage of any spa or wellness facilities that the hotel may offer, such as massages or sauna sessions.

Furthermore, guests can relax and unwind in the hotel's comfortable rooms and take advantage of any in-room amenities provided. They can also engage in activities such as reading books or watching TV.

Overall, the specifics of leisure amenities at the Brenzhotel Heidenheim are not mentioned, but guests can still enjoy their time at the hotel through various activities and amenities available.