By Daniel Kline The cruise line has not brought back a popular very adult event, but there are signs that may change. Cruising has largely returned to what it was before the pandemic — at least once you board the ship. Before you cruise, Royal Caribbean International (RCL) – Get Royal Caribbean Group Report, Carnival Cruise Lines (CCL) – Get Carnival Corporation Report, Norwegian Cruise Line (NCLH) – Get Norwegian Cruise Line Holdings Ltd. Report, and the other lines sailing from U.S. ports still require would-be passengers to check some boxes. First, all passengers 12 and over must be fully …