If you are talking about a living room, both are correct ,but 'the' is much more natural for the reason you have stated. I wouldn't say 'the' for a bedroom, because bedrooms do not usually have couches.
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CliveIf you are talking about a living room, both are correct ,but 'the' is much more natural for the reason you have stated.I wouldn't say 'the' for a bedroom, because bedrooms do not usually have couches.Thanks, Clive.