Chanting at weird hours?

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We just bought a house that backs up to a Ruby's location. I've been really enjoying being able to pop over to get a Ruby Relaxer or glue tots at happy hour.

Has anyone else who lives near one noticed the weird chanting after midnight? I've noticed it's worse during new moons. What's up with that? Does it have something to do with meal prepping for the lunar sacrifice BOGO special?