The Winnipesaukee Playhouse Professional Company Presents Last of the Red Hot Lovers by Neil Simon   Simon’s comedy about Barney Cashman’s failed attempts to join the sexual revolution!   Middle-aged, married, and overworked, Barney Cashman wants to join the sexual revolution before it's too late and arranges three seductions: the first proves to be a foul-mouthed bundle of neuroses, the next is a 20-ish actress who's too kooky by half, and the third is a gloomy, depressed housewife who happens…