Husband chair is a chair in a womens' clothes store/department for a guy to sit in and wait while his wife or girlfriend shops.

“老公椅”是女装店或商场女装部里的椅子，供男士在女友或老婆选购时坐下来一边休息一边等待。

Example:

You go ahead and shop. I'll just be over here in the husband chair.

你自己去挑吧。我就在那里，坐在“老公椅”上。