As this picture shows Parkhotel Krefelder Hof offers the traveler who happens to travel alone a slightly better bed than the Rheydter Residenz in Mönchengladbach.
This bed is big enough for an adult and a small child, maybe even a dwarf.
Parkhotel Krefelder Hof does have a swimming pool. This morning before breakfast I went for a swim. There was just one old lady in the small pool. After seven minutes I left. Swimming is a beautiful pastime but you should not overdo it.