shouting people

I am sitting in my beloved coffee shop as usual for me at this time of the night, using their free wifi. There is a group of men, mostly, in here with me, all of whom are here to watch the Yankees baseball game on the TVs. These men are standing extremely close to each other, and one or two touch each other at times, and all of them have located their mouths approximately 12 -24 inches (between 30.5 and 61 cm, or roughly 4 and 8.35 baseball diameters) away from at least one of their friend's ears. So my random question is Why are they shouting at each other? Does anyone know why most men (but…