Two men share a single chair, their arms around each other.
He sat on the single chair and she stood behind him.
He sat in the single chair by the table and sighed.
A single chair sat out in the middle of the room.
Instead, she waved him to the single chair, then sat down on the bed.
There was a single chair with a newspaper on it.
He kicked the single chair toward the bed and sat down.
Some of those places are so tiny a single chair is all they want.
He sat down on the bed and indicated the single chair for her.
Because he wanted her to, she took the single chair.