I decide to smile and stay pleasant, but one of our guys is known for politely asking out to toilet. And return no sooner than in fine minutes. Seems to work and does not destroy the co-operation. Eventually, many of the smokers (and the total percentage is very low, for those who cant wait after flight) started to ask everyone wheather we would perhaps go and have a chat in the forwar galley for 5 minutes.
Fair play on both sides...
FD.