Nashville– Pre-opening sales for the Music City Center now 600,000 room nights, bringing it closer to an internal goal of booking one million room nights for the 1.2 million-square-foot convention complex prior to its opening in 2013, according to the Nashville Convention & Visitors Bureau. Two months ago the CVB announced having reached 500,000 room nights, representing the half-way mark in pre-booking activities, and indicating the goal will be reached if bookings continue apace.