Considering how much money they can charge for drinks, the free water is not a very realistic approach, but they did at least offer something of added value that the girls weren't offering.
Nicole's been screaming since day one, which is why she can generally barely talk by the time it gets to the boardroom.
I would not have responded to the guys' approach either. Aggressive sales people irritate me. Let me make up my mind, then I'll come get your assistance if/when I need it. However, others obviously will respond to it, which the girls could clearly see, yet didn't attempt to change things up.