Each hotel is attributed to the nearest settlement / town; but it might be 100 kms away!
You will find the following accommodation properties listed in and around Mariental:
in Mariental: Kalahari Anib Lodge (Gondwana Collection)
northeast of Mariental: Bagatelle Kalahari Game Ranch
in Gochas: Auob Country Lodge (Namibia Country Lodges)
in Stampriet: Kalahari Farmhouse (Gondwana Collection)
east of Koes: Torgos Safari Camp