The Sheraton Music City Hotel offers guests complimentary airport transportation. Here is how it works:
When you land give them a call at 615-885-2200 and let them know you are ready to be picked up. They will meet you in a blue colored Sheraton Music City shuttle bus at ground transportation, which is 1 level below baggage claim at waiting area #2.
To return from the hotel to the airport: Shuttles start running at 4AM and depart every 20 minutes until 11PM.