The two sessions I'm involved with have kept going without losing performers but every fifth song or so half of the room disappears for a smoke, leaving the next couple of performers playing to a significantly quieter room. Also, the result of 10 or 12 smokers returning together means that the singing space can seem smoky anyway!

Also, the casual listeners we used to get seem to have stopped coming which is a shame, because in the past many have got hooked and even started singing themselves.

It'll be interesting, as winter progresses to see whether people will still turn up if they have to risk frostbite every half an hour.