Hilton interview questions

I applied for the server position through the local workforce commission. I was called back by the HR coordinator who asked some basic questions and then had me come in to interview. After filing out the paper application with HR, I was interviewed by the restaurant manager. He asked about my past experiences while going over my resume as well as availability and some behavioral/situational questions. Nothing too difficult. This interview lasted around 30 minutes. He escorted me back to HR and I was then told to return the following day for a panel interview. The panel consisted of 6 department managers from all areas of the hotel (Food and Beverage, Spa, Finance, HR, and a couple of others). I believe that all of them asked one question, again regarding my background and my philosophy in the hospitality industry. This interview also lasted around 30 minutes. At the conclusion of this interview, the HR director offered me the position and I returned to HR to begin filling out the background check information and took the drug test. I wasn't given a start date. After a week, I called back and was told that my application was being reviewed by 'corporate HR.' A couple of days later, they called and rescinded the job offer with no explaination. I don't know if they found another candidate that they liked better or if it was something in my background or what. No explaination and was told they didn't have to give me one. This left a very negative impression on me. You don't have someone go through three different interviews with eight different people, offer them the job, have them take the drug test, and then take back the offer without explaination. Not only will I not refer anyone there, I will never stay or dine in a Hilton property again. They need to realize that job applicants are also potential guests.