As you can see, spin rooms are kind of noisy; they're also pretty focused places. Everybody in there - including probably you - needs a specific piece of information and/or quote to finish up their own material, and the sooner they get it, the sooner they can get somewhere about ten to fifteen degrees Fahrenheit cooler. This is actually conducive to good manners; after all, arguments and shouting matches eat into time. Should you ever participate in one of these, I recommend patience, waiting your turn, and hitting the restroom on your way in.
And business cards. They're highly useful in these situations.
Moe Lane (crosspost)