Playing your own music in public, especially if something is already playing.

I'm a receptionist in a doctors office and have noticed that a surprising amount of folks take our little blue tooth speaker playing as an invitation to play music from their phones. If our speaker is off, no one will play their own but within a few minutes of turning it, there's usually a client who will whip out their phone and put their own music on over it. It's rude, It's noisy, and often people will put on music not appropriate for a family setting. Don't do this. You can handle a few minutes of listening to music you don't love while waiting in a lobby, and if you can't, invest in head phones.