I recommend this whole webpage by Richard Powers - some very useful information about social dancing and life ; )
Here are some excerpts from the article linked above:
"Randomly dying brain cells are like stepping stones being removed one by one. Those who had only one well-worn path of stones are completely blocked when some are removed. But those who spent their lives trying different mental routes each time, creating a myriad of possible paths, still have several paths left."
"The essence of intelligence is making decisions. And the concluding advice, when it comes to improving your mental acuity, is to involve yourself in activities which require split-second rapid-fire decision making, as opposed to rote memory (retracing the same well-worn paths), or just working on your physical style."
"Dancing integrates several brain functions at once, increasing connectivity. Dancing simultaneously involves kinesthetic, rational, musical and emotional processes."
"Jean Piaget suggested that intelligence is what we use when we don't already know what to do."
"freestyle social dancing isn't that simple! It requires a lot of split-second decision-making, in both the lead and follow roles."