Tickets are sold out for the weekend shows of “Take a Gamble on Nevada” or “This May be Your Last Harrah,” but some are still available for the Feb. 7 cocktail show.The Douglas County Historical Society’s eighth melodrama fundraiser is Feb. 7-10 in the Carson Valley Museum & Cultural Center.“This year we have an unusual twist with a female villain. She’s very elegant, but sneaky and conniving,” writer and director Dave Thomas said. “Join us for singing, dancing, and plenty of zany gambling humor at the Casino Mindenville. From the evil villain lurking about to the wisdom of the Great …