Some good points here. I have also considered that after a few weeks of probing, as soon as they find out I do not have kids, grand kids, or great grand kids I will be essentially ghosted. Most apartment type situations, in fact all of them, I have lived in, nobody knew anybody unless they had a pre-existing relationship. (relatives, worked at the same place etc) I suppose this situation could end up the same. Then I could just partake of whatever "activities" I think might be useful.
As far as you not wanting to know jack diddly about other people's kids, grand kids, and great grand kids - isn't that what friends talk about sometimes, their families?
Yes. I know.
I don't think you'd be ghosted, though you would likely have to periodically listen to talk about their families, as difficult as that might be. Similarly, whatever your hobbies are, or gets you excited, whether they are truly interested, they would be listening to you talk about it, show some interest, and get some level of satisfaction over your happiness in whatever it is that brings you enjoyment - again, because that's how friendships work. Who knows, maybe you'd hook up with someone who is in a similar situation and likewise has no desire to talk about their family?
I believe the model is to keep folks active, involved, and socializing - it's mentally and physically important and so they structure it accordingly.
In mom's scenario, though it was similar to apartment living from the physical layout, with indoor corridors, everyone knew everyone else near them. They all made a concerted effort to become friends with mom. I knew all of her neighbors as they quickly introduced themselves to me when I was moving mom's stuff in (and then again to offer condolences when I was moving her stuff out after she passed), were all outgoing and friendly, and were genuinely interested in getting mom involved. It was very collegial and communal. Now that I think of it, though there was one husband/wife next door to mom, all of the others in mom's wing were women on their own.
It's really good that you did go visit one now to see how they operate and get an idea if it might be a good fit for you in the future. With mom, we didn't have that option. We were flying by the seat of our pants in real time. Our biggest concern was if they had availability at the time we were checking it out. At least in NJ, this has become a very big business - catering to senior living. There are many, many 55+ active living communities being built. There is continually high demand and not enough supply, which is obviously why they are building so much more.