Focus on the versatility of an item or space having more than one function.

Multiple Uses

Emphasize how 'double up as' can mean maximizing limited space effectively.

Space-Saving

Suggests an innovative or unexpected secondary use for something.

Shows that doubling up may be out of financial necessity, not choice.

Implies that doubling up often may be a short-term solution.

Highlights potential discomfort from sharing limited living areas.