[PeterPrinciple]

As a Christian, I wonder what would have happened if someone had stood up and started preaching or singing a real salvation song.

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There is a good chance we may experience something like this. Now is the time to do some mental rehearsal so we don’t have to think about what to do when it happens.

[machogirl]

I can’t sing worth a darn, but I might have stood up and sang the national anthem and asked other diners to join in. Flash mob them out!

[ctdonath2]

Singing “Amazing Grace” might prove interesting. Most people know it (at least relative to other hymns etc), so you’ve got the greatest chance of others chiming in - and of the malcontents suffering cognitive dissonance in the process.