As a child in a large Asian family, we always had a round dining table with a Lazy Susan in the middle. I don't live with my family anymore, I don't have a big round table, but I did buy a small Lazy Susan about 7 years ago.
IKEA calls this a SNUDDA - which in Swedish means 'to touch slightly enough to be almost not touching at all'. I guess they may have selected this name because its ball bearing operation requires very little effort to move it (see video).
The primary uses of my Lazy Susan are:
To share ingredients at Steamboat parties.
To pass dishes at family style meals.
To make appetizers at parties easier to reach.
To serve pizza (I use it as a cutting board sometimes, too).
If you are a cake decorator, I am not, you could use the SNUDDA as a turntable to rotate the cake when you apply the icing.
Most of the time, my Lazy Susan is on one of my kitchen counters under the napkins, bottled water, and vitamins.
The top of the SNUDDA is solid maple. The only maintenance it needs is a wipe with a damp rag or sponge. It is approximately 15 inches in diameter and will accommodate a load of about 26.5 pounds. The surface of the SNUDDA is approximately 1.25 inches high. It remains well balanced with any reasonable load of food dishes. Its operation has always been flawless.
The term Lazy Susan was first used in 1917. There is no agreement on the origin of the term. This type of rotating serving tray was previously known as a dumbwaiter.