I live in a senior apartment bldg. 62 and older. Right now, I am very happy here among my peers. I spent 35 years in a mixed age neighborhood...families and others. It was ok when I was a bit younger. But now I do prefer being with other seniors. We still see our share of children here...when grandkids visit.
But, as some have said, it is not ideal for everyone.
Yes, there are the "high school" gossipy groups, and a small group of mean girls. But I have better learned to speak up for myself and just walk away when the mean girls get too , well, mean.
Even when younger, I was more comfortable among older adults....my parents were in their 40s when they had me.