Here in UK it seems that the danger zone is 40 - 60 and those that have "issues".
In our circuit I know of three couples kicked to the kerb last year.
The oldest is a "nondescript" elder (mid 50's I'd guess) who has been a bethelite 25 years and his pleasant enough zealot wife (late 40's I'd guess) who were on "maintenance" (him) and "laundry" (her).
He has a menial job (cleaning quelle surprise) with a local gangmaster brother who is known for being a harsh taskmaster and having a screw loose! She has a job doing admin. work in a Doctors' Surgery.
Another couple is a mid 30's brother who was in transport and his "nervy" wife who was often sick with unfathomable illnesses - so they were obviously right for the chop.
Then a couple about 40 where the wife was really only there to please him and do her duty but who hated the place.
It seems if you are over 60 then they are shamed into keeping you and the keen under forties seem OK too - mind you, when Chelmsford luxury retirement complex is finished we'll get more booted I'm sure.