There are lodges scattered about every 1/2 hour to 1.5 hours along the trail. Most of these lodges are merely stone huts that become less and less clean and inviting the further up the trail. All of the lodges are stocked with drinks and supplies. Often because of the less extreme night time temperatures at the lower elevations you could sleep in your sleeping bag outside of the lodge.
Inside, the rooms are often upstairs. The beds are basically a thin blanket thrown on top of a mattress. You need your sleeping bag for warmth at most lodges. Some did have extra blankets that were dirty and smelled bad. For some reason the price of lodging became less expensive the further up the trail. The night we spent at 16,200 feet, we paid 10 cents American per person for our lodging.
The lodges had a first floor for dining, cooking, and relaxing. All the lodges had wood stoves, some had two, one for cooking and one for heat. Some did not. Yak dung was the preferred fuel of choice. The smell was driving me crazy after a few days on the trail. Most of the lodges were quite dark inside.