Free Hotels,
This works best with 5 stars. Call the hotel it's self, not the 800 reservation #. Tell them you have comped nights credited or a gift certificate (one without numbers), or whatever. Tell them you do not have a credit card if they ask for it. Reservation lines require credit cards for reservations, main hotel receptionist can make it without one. Then just show up for reservation. If asked to call a certain person for verification, don't. trust me, just let it flow.
historic example; I checked in at a five star and told the desk clerk that "my reservation was comped from a time I partied with the hotel VP. I couldn't remember the VP's name but he if wanted to call him and verify, he should let him know that I'm the guitar player for Porn Junky." As he started to dial the phone I said, "Tell him I'm the one that gave him the 18 inch studded glow in the dark dildo and other goodys from our promotional bag. The clerk glently hung up the phone and honored my comped reservation.
training videos I recommand;
1 Heartbreakers; Jennifer Love Hewitt takes the trip and fall approach.
2 Grifters
3 Dirty Rotten Scandrals