If you're looking for informality, the vibe at NHC is such that you could walk up to any group of people that don't look like they're not terribly busy (most people) and say 'Hey, I have a beer and a survey. Want to try it and provide feedback?' You could do this at the hospitality area, in club night (you don't need a booth, just bring beer), while people are waiting in line to get into the banquet, as people are mingling outside the seminar areas, in the lobby, in the hotel elevator, as guys are waiting in line for the bathroom (women never have lines at NHC) ... basically anywhere, anytime.
I have a picture of Randy Mosher at club night two years ago. He had a moving dolly with a keg and CO2 tank strapped to it and a picnic tap. It was a beer he created for a commercial brewery he's involved in, and he was just walking around pouring samples. Super simple.