'Dames at Sea,' the ultra-campy 1966 musical about the you'll-come-back-a-star backstage movie musicals of the early '30s, has finally made it to Broadway. I'm not sure why, since the point of the show...is that it's a low-budget miniature send-up of the genre...though this gussied-up revival...is nothing if not charming. If you like high-velocity tap dancing, you'll see (and hear) plenty of it, and Mr. Skinner flings his tiny cast across the smallish stage of the 597-seat Helen Hayes Theatre with endless visual ingenuity, aided and abetted by Jonathan Tunick's flawless period-style orchestrations for the eight-piece band. So what's not to like? Nothing whatsoever -- but there isn't enough to love about 'Dames at Sea,' which may have seemed sufficiently witty a half-century ago but has long since been outclassed...