In Kham Charoen, a hotel must offer a specific number of upscale features to be rated 5 stars. These can include on-site gyms, spas and saunas, gourmet restaurants, luxury toiletries, premium bedding and more. What also sets 5-star hotels apart is their outstanding service. You can expect things like concierge services, in-room massages and nightly turn-down services. Some may also offer additional touches like welcome gifts.