Part of my subspecialty is seeing patients with sleep disorder. We run a multi-bed sleep laboratory, which looks like standard and non-fancy hotel rooms, where we have patients sleep overnight. The patients are connected to several sensors to monitor their brain waves, heart beat, breathing, oxygen level, eye movement, and arm and leg movement. It is surprising that they can still sleep with all these contraptions. Sometimes we perform daytime sleep study too where we allow them to take a series of naps to look for a specific sleep disorder.
Not too long ago, we went to a resort in the mountains, where they have a room (photo below) where you can just relax and sleep. This is my idea of a real sleep laboratory.
(*photo taken with an iPhone)