Are you sure you won't need them yourself if you start on the electric fags?
I'm finding I need at least one ashtray in every room because I can use it anywhere, but it's too heavy to just leave in your mouth or clamped between your teeth - you need somewhere to put them down!
I'm positive ashtrays, especially good ones, are going to become popular/useful again because of the rise of electric cigarettes. According to stuff I was reading on the web about them (American site, pro electric ciggies) 3% of smokers had converted last year, 7% this year. They work
, far better than any other sort of replacement.