This is one of the most unglamorous but simple necessities every home and office should have - metal Folding Chairs. Heavy Duty Commerical Grade Steel Folding chairs allow you to quickly setup or expand your seating then fold-up and store easily.
So you are hosting Christmas dinner at your house for the whole family... Everything is coming along fine, until you get the call alerting you that your mother-in-law has invited more people to join the family. I had that very thing happen to me this past December. While I love to entertain and have plenty of room to do so, I never seemed to have enough chairs for people to sit. Off to Sam's I went. It is definitely not my favorite place to shop, but I knew they would have exactly what I needed - no time for dry runs.
I purchased three set of fours metal folding chairs in a drab gray/green color. They were not purchased for looks or comfort. My priorities were storage and function. These are well made and will last a very very longtime and available at a moment's notice when needed. We also bought these same chairs for my department at work.
Your scenario may be different, but we will all have moments that require us to expand our seating.