I found heavy duty velcro (adhesive) stuck to the hardwood floor and to the bottom of each sofa leg - mine were bun type- worked perfectly. I secured a sectional that would not stay together or in place after trying many things. It is not permanent, and can be removed if I change the sofa location.

We bought these little square rubber cups that the feet sit on at either Home Depot or Lowe's. We use them on our sofas and beds with wheels now that we have wood floors. Prevents the feet from indenting the floors and no more rolling around! I found them down the aisle with misc. screws and hardware.

Thanks! I think I might even have some of those rubber cap things somewhere.