When I needed to leave my house, I did look at retirement flats. Found them all very small (compact??), tiny kitchens, no room for personal washing machine, all had a launderette room for use by residents.
This would have been no good for me. Due to a medical problem I very occasionally, do need to strip bed, and myself and wash everything. Like to do that in the privacy of my own home.
Having looked at several of these flats, I then looked at ordinary purpose built flats in the same area. What a difference! These (on the whole) were much more roomy, much less to pay on maintenance charges, the one I chose has its own garage (even without a car, very useful for all sorts of storage.).
Well, you can guess which way I went. So for the past seven years have lived in this lovely block of 25 flats. All owner-occupied - no chance of any anti-social behavior. Self managed by an elected committee of flat owners, so no payment to any private company. Very central, - within ten minutes (walking or on my mobility scooter), I can get to beach, park, library, museum, theatres, cinemas, station, shops, buses etc.etc.
For social activities and meeting people, I have joined local u3a and also coffee mornings arranged by other organisations. Getting out to these is important in itself.
When a flat needs to sold, it goes through the normal process with any local agent, no monies from the sale are payable to our Management Company, although - obviously, while it is empty service charges still have to be paid. All the flats are good sizes, all have an en-suite as well as a second bathroom, large Living/dining room, good sized kitchen and two bedrooms.
We do have the occasional afternoon tea party in our large and beautifully kept entrance lobby.