Never smoked and never will (ok, I've had maybe half a dozen over the course of my life, but not in years).

As far as alcohol: oh yes, although my tolerance has gone way down as my cycling mileage has gone up so a four or five glass week is a lot. I've been working on a single Samuel Smith oatmeal stout for hours now. Getting wine down is easier.

Being fit is turning out to be a guilty pleasure.