It's Panera, not a library or church. You're going to get loud conversations, babies crying, dishes clattering, those infernal buzzers going off directly behind you, and the occasional person who just doesn't care what other people think of what they're listening to. Sure it's rude but unless you care to ask them to stop being noisy yourself, your own threshold for acceptable volume doesn't make a difference. If you're easily bothered the library might in fact be a better choice, but long story short this is why people who have offices tend not to work from cafes most of the time.
LOL @ "infernal buzzers"
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