We also had a glimpse into the wonderful RFID technology, a few times. But you brought up a good point, what if there is no card to swipe. This happened to us with our room. We checked in early Friday morning, so of course our room wasn't ready. We came back at about 3(when it should be ready), still not. At about 3:30 it was finally ready. We got our room number(already had our KTTW). Luckily for us, my roommate had luggage being transferred from another resort, so we went up to our room with a bell hop. Touch key to the door, red light. Try again, red light. Try the other key, red light. They keys didn't work, and there was nothing to swipe. Because the bellhop was with us, he called to verify our room, and was able to let us in while someone delivered new keys. Had he not been with us, we would have had to walk all the way back to the main area for new keys, then all the way back to our room.