Single men need no longer be wallflowers on Crystal Cruises. The line is to provide partners on its ballroom dancing themed Transatlantic crossings. It has long provided “Ambassador Hosts” for unaccompanied women passengers – or those whose husbands or partners don’t dance. Now there will be two potential partners for men. The first voyages on which they will appear are Lisbon – Miami (October 5 this year and December 11, 2015) and New York – London (June 12, 2015).