The website Mahalo.com has put together excellent step-by-step instructions on becoming Don Draper from Mad Men for Halloween.
Essential elements include french cuff shirts, a retro tie, and a jar of Brylcreem. And don't forget the Manhattans!
Presumably, the men dressing as Don Draper will have to supply the irresistibility to women all on their own. Although, maybe this is something we could get our husbands to go along with...