News Mandalay Bay Convention Expansion Posted on April 13, 2015January 28, 2020 by Vergith 13 Apr We are excited to be part of MGM Mandalay Bay’s $66 million 350,000 square foot expansion. Upon completion, this will create more than 2 million square feet of convention space, making it the 5th Largest in North America! Welcome to The Delano! Welcome Rand!