Fancy bartenders order 3 legged tables because they know they can't wobble. Really fancy bartenders can show you a proof that every 4 legged table on a rough surface has at least one stable orientation. https://people.math.harvard.edu/~knill/teaching/math1a_2011/exhibits/wobblytable/#:~:text=The%20wobbly%20table%20theorem%3A%20you,depends%20on%20the%20angle%20x.

Wanky bartenders can make a decent cocktail, but don't consider table stability.

Source: me, bartending in the 90s.