"I have a child and one day a male guest was full frontal, " said Dian Chen, an artist, who has lived in Manhattan Plaza since 1978.

WSJ: Hotel Offers Rooms With Risqu�� Views

Rwanda, in particular, has developed a lucrative eco-tourism industry based on rich foreigners who wish to follow in the steps of Dr Schaller and of Dian Fossey, an American researcher who brought the gorillas' plight to the world's attention, and was later murdered, probably by poachers who did not welcome the publicity.

ECONOMIST: The number of mountain gorillas appears to be rising