'Don't Dress for Dinner,' the little bon bon that French playwright Marc Camoletti dashed off after 'Boeing-Boeing,' ran for seven years in Blighty, where auds dearly love a naughty French sex farce featuring philandering husbands, saucy mistresses and lots of well-oiled doors. After working up this high-gloss version of Robin Hawdon's crafty adaptation at Chicago's Royal George Theater a few years ago, veteran helmer John Tillinger brings it in with an A-list design team and a cast that knows how to negotiate the sublimely silly conventions of classic farce.