In Brief Lives there's Vinnie, Fay's rakish mother-in-law:
Her daily routine was to get up at about ten-thirty, smoke the first cigarette of the day, take a bath and dress, and then apply the heavy make-up, without which she looked like a seamed and battered twelve-year-old. (Ch. 3)And in A Misalliance, we find Sally Beamish, a true Brookner monster, a careless insider, careless as the gods of antiquity:
As far as Blanche could see, Sally spent those days ... simply lying on her chaise-longue, smoking, and waiting for someone to turn up. (Ch. 5)But what of Blanche, the ostensible Brooknerian, but morally vulnerable, flirting with other lives, and a toper to boot? Yes, we find her taking a drag too. I can find one reference, in Chapter 11; there may be more.