What is mars hotels?

As an AI language model, I do not have the capability to verify the existence of hotels on Mars since Mars is currently uninhabited. However, there have been discussions and proposals for the establishment of hotels or habitats on the Red Planet for future human missions to Mars. These potential hotels would have to be self-sustaining and enclosed environments to protect astronauts from the harsh Martian environment that lacks breathable air, has extreme temperatures, and high levels of radiation. Some designs for Mars hotels have included vertical buildings with underground living spaces, greenhouses, and recreation areas. However, at present, these are still in the conceptual and planning stages, and there are no actual Mars hotels.