BUTLER, Pa. — The hotel on the outskirts of town looks a lot like lodging one can find on any American highway. Over the years it has been a Holiday Inn and a Days Inn. The sign outside now bears the brand of a new, growing chain. One that promises a lot more than a good night’s sleep.At the Tesla Wellness Hotel and MedBed Center, about 45 minutes north of Pittsburgh, the enticements are nothing short of miraculous.Part motel, part new-age clinic, the facility offers nightly rentals in rooms that come equipped with “BioHealers” –- canisters that the company claims exude “life force energy,” or biophotons. Testimonials from the company's patients speak to the devices' power to treat cancer, dementia, chronic pain and a long list of other ailments.The center also sells the canisters for home use. Prices start at $599 and range all the way to $11,000 for the largest model, with slightly cheaper versions available for pets and children.Just don’t call the thousands of people who have shell...