This may be an acquired taste but if you love ballroom dancing and those TV shows where celebrities dust off their dancing shoes to compete, Royal Caribbean is bringing "Invitation to Dance" on its Explorer of the Seas ship. It's one of their production shows but instead of letting the cast and crew do all the work, passengers are invited to step up, step out, and even compete.<br /><br />This is ballroom dancing: think rumba, cha-cha, samba, the waltz, and swing.<br /><br />At the start of each cruise on Explorer of the Seas, there is an evening of ballroom dancing at which four couples are selected to participate in the "Invitation to Dance" show later that week. The lucky couples who get the nod will work with choreographers, costume designers, and the technical behind-the-scenes people to be part of a world-class show. Cheryl Burke, a two-timer winner of the TV show "Dancing with the Stars," is the hostess.<br /><br />On show night, the four couples (who probably up to now have been having a great time getting to know each other) become competitors as the audience picks the winning couple.<br /><br />Explorer of the Seas sails out of Cape Liberty Cruise Port (Bayonne, New Jersey) and offers a five-night Bermuda sailing or a nine-night tour of the Caribbean.