We need to be careful not to create a political problem with the hotel. We did not get any complaints about the snack exchange and the wine tasting in the last years - although both are technically a violation of their terms and services. So they're pretty tolerant - which makes sense, sales at the bar are pretty good, and it wouldn't gain them anything to start a fuss and strain our good relationship. That doesn't mean there's a guarantee though - it's an act of good will. And that means, we should be considerate. If they get the impression that we're "serving" food and drinks, they will charge us for it. There's actually a price list with the penalties that is part of our contract - and they are based on their restaurant prices.
My personal feeling is that we'll get away as long as it's all a "sampling" or "tasting" and nothing that gives the impression of posing competition to the bar, the restaurants, or their food/concession stands. So whatever you are planning, please keep that in mind.