Chicago theater mid-season preview, Part 2: Ahead at Porchlight, American Blues, Raven

Preview: Chicago’s turn into real winter comes with the consolation of intriguing theater just ahead. Think of it as warming countermeasures. Porchlight offers the musical farce “The Gentleman’s Guide to Love & Murder” while Raven plots Paula Vogel’s now-classic memory play “How I Learned to Drive.” American Blues jumps into the season’s second half with Steven Dietz’s “On Clover Road.” If a play synopsis that begins “At an abandoned motel on a desolate road” sounds more like a chiller, at least it will unfold in a snug place.