No, nothing offered. I was taught the 3 ways to over-exposure are inhalation, ingestion and absorbtion. Dust and debris floating around will settle on the drinks/cups/etc and be ingested by the client.
There was a thread on it on here years and years ago, Doug Schoon was around on the site then and he advises against it for those exact reasons. In fact, hot drinks attract the particles more than cold.
Added to that I don't want clients moving their hands around when I'm doing their nails. They can't put them in the lamp without getting the polish all over the place, add in a mug/cup/etc. and it's got disaster written all over it.