Explain Entropy Like I'm at a House Party

You want to actually get entropy without a single equation. This uses the Feynman technique: it starts with something concrete like a messy room or a shuffled deck, then builds up to why entropy always rises in a closed system and never tidies itself, explaining what a closed system even is along the way. Covers both thermodynamics and information theory in plain English.

I want to understand entropy using the Feynman technique. Explain entropy as it applies to thermodynamics and information theory using only everyday analogies: no equations allowed. Start with a concrete scenario (like a messy room or a shuffled deck of cards), then gradually build up to why entropy always increases in a closed system and never spontaneously decreases. Explain what a 'closed system' means in plain terms. End with a single clear sentence I could use to explain entropy to a curious friend at a dinner party. Keep the whole explanation accessible to someone with absolutely no science background.