We use our marine radio all the time. We hear calls to the marine patrol, Tow boats, and many conversations on various channels. Our group of friends choose a channel and we call to verify rafting positions. Our marina monitors channel 14 so we can call if there are issues. One of our friends did not have a radio so we chipped in and bought him a protable one and it works well. Very effective to gather for outings and organizing cruises. We also can call out bone-heads. We leave our radios on until the last boat arrives in their slip.
I guess I must be a part of the "no one" group that never uses the radio.