But surely its possible to stretch that definition a little
If its a true charcoal grey suit, black shoes are your best friend
Both would be great

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Big Machine said, "The Big Machine Label Group and Dick Clark Productions announce that they have come to terms on a licensing agreement that approves their artists performances to stream post-show and for re-broadcast on mutually approved platforms
In other words, you need to wear an outfit that you are expected to wear at these venues