The Altstadt Hotel Blomberg offers single rooms for single occupancy, which have a room size of 269 sqft and 1 twin bed. Smoking is not allowed in these rooms. The hotel also has double rooms, which have a larger size of 431 sqft and accommodate 2 adults and 1 child. These rooms have 1 queen size bed and smoking is not allowed.

According to the provided data, there is no information about the featured amenities or other amenities at the Altstadt Hotel Blomberg. Therefore, it is not possible to provide specific details about how guests can spend their time at the hotel.

However, based on common leisure amenities found at hotels, guests could potentially spend their time at the Altstadt Hotel Blomberg enjoying facilities such as a swimming pool, fitness center, spa, or restaurant. They could also explore the surrounding area, visit local attractions, or take part in activities organized by the hotel such as guided tours or cultural events.

Please note that this answer is based on general assumptions and may not reflect the actual amenities and activities available at the Altstadt Hotel Blomberg. It is recommended to refer to the hotel's official website or contact them directly for more accurate and up-to-date information.