What shape cocktail table is best? Well, there's advantages to the various shapes and sizes, we'll go over each below.
1) A rectangular shaped cocktail table is convenient!
A long rectangle means more people having access to set down a drink! Approx 2/3 the length of your sofa is nice, if room allows.
2) A pair of small cocktail tables can be easily moved whenever you like.
If you notice a guest wants to set down their drink, they're easy to move. They also have a fun unique look! Notice they are spaced about 8" or 9" apart, so they end up taking up the same amount of space as one long cocktail table.
3) A square contemporary cocktail table (below) helps settle a large open space.
If the height of it is low, you can go with an over sized one, If it's taller than your sofa seat cushions, you'll need to make sure it doesn't overpower the room.
4) A round cocktail table help soften a room, when the room has a lot of angles.
The table below looks great because the chair has a curved shape to compliment it.
A round table in a large room normally needs to be at least 45" in diameter. You can cut newspaper in the shape to play with the size.