By Samuel L. Leiter April 12, 2026: Four years ago, when I saw Titanique in an intimate, subterranean, club-like theatre in Chelsea, it reminded me of an earlier show, 2013's magnificently cheesy musical Disaster!, seen in a similarly dinky Off-Broadway venue. Disaster! would have made the stern faces on Mount Rushmore crack with laughter if they had seen it from their lofty perches. A jukebox burlesque of 1970s …