There's been a disparity in chair prices between the smaller, more crowded, beach restaurants and their larger counterparts for many years. Once the smaller ones have facilities to offer, you can be sure their prices will increase, although not to the level of Kon Tiki and Kakao, because the chairs at the smaller places are closer together. Some people are happy to pay a bit more for a bit more space around them.

To infer that the reason the larger bars have a larger area is because of some type of collusion is inappropriate, and perhaps even libelous.