The role of the Ah Counter is to notice and give feedback on the various extraneous sounds people make while they are speaking. Simple feedback works wonders.
People actually improve.
This helps you figure out who is who, and could serve as your scorecard. As the meeting starts, make sure you have a list of everyone present. Stand and give a short description of what your role will be. Yeah, everyone knows it already, but the guests don't. Sounds obvious, but it's harder than one would think.