You will need an 'invitation' in rder to get a visa. You can either call the hotel (on the telephone) and ask them to send you one, or you can pay one of the many visa services $20 or $30 for one. It's also a good idea to pad your travel dates in the visa application in case you change your plans, etc. Doing that generally means your dates don't coincide exactly with the hotel stay. I suggest you do some research on the subject.