I work in an arts centre, we didn't do it last year and I know a bloke in another department complained to the management about that, but I dunno if anything came of it. It's a bit tricky because we can't stop in the middle of phone calls, and if we turn the phones off people will inevitably whinge about it. I think it is dying out but I don't really think that's a problem. Pity my poor bf - it's his birthday tomorrow and everyone is having protracted gloomy silences...