CaliQase, I think What he means is that at times, he invites some clients of the company he works for and the etiquette is that you have to pick up the tap and pay for whatever beverage they might order, be it hot=coffee or tea and cold=alcohol or soft drinks.
So in this regard, is he incurring any sins by paying for say if they order wine or beer!
A bit of a sticky situation this, but what about if you use company card to pay for it and not your own money? In that sense it's the company and not you who is picking up the tap?
I asked a brother who knows better than I do; he says it is complicated but it is probably better if you pay from the company's pocket.
I think if you can't do any thing about it, you got nothing to worry about BUT if you can do something about it and go ahead with it, then you got a problem.
We should wait for Sh. Hyper's view.