Carbonated beverages, what do you tell people?

Stephanie M - Well said.

I wouldn't worry too much about what others think with reference to you not drinking carbonated drinks, you could always tell them that the carbonation doesn't agree with your tummy.  As for your employment, it should not be a requirement for you to drink/consume beer or alcohol because of the liability with DWI or accident reasons.  If you really want to be exceptionally well at your job, you could always do what they do at brewery's, take a sip of beer, swi**** around in your mouth and spit it out.  Write down on paper or record what the qualities of the beer are and then you will have first hand knowledge of the product.  Best of luck to you.