Jennifer Ehle's co-stars in Noel Coward's Design For Living are smelling a bit odd these days. Thursday afternoon Ehle walked into East Village odor boutique Demeter Fragrances, and bought her fellow Off-Broadway cast members Alan Cumming and Dominic West perfumes called Gin & Tonic, Bourbon, Champagne Brut and Earl Grey Tea as presents for the opening night performance later on. "You could probably guess the recipients of each gift," laughed one insider.