You do not have a choice in California. I was on a jury in a wrongful death case, and the Judge made it clear, and attorneys for both sides agreed, that the law in California says, as long as the facility is licensed to treat your ailment, you have no say in where you are taken, or if you are transfered to another hospital. Transfers frequently happen to move you to a hosptial that is on your insurance prefered list.
I listen to the ambulance radios as part of my job, and they use a round robin system in emergencies. They rotate ambulances one at a time through all 8 hospitals in the area, so that no hosptial gets overloaded in the ER. You have no choice.
As to the original post, one of the local non-profit hosptials here sponsors the fireworks every Saturday night at the Minor League baseball games. I often wonder why a non-profit hospital has to advertise, and how much free medical care they could give away to low income folks instead of burning it up with fireworks.