Out of interest, OP, when you say "teetotal" do you actually mean teetotal, or just not actually an alcoholic/rocking up steaming drunk?
I mean teetotal.
We aim to get people housed, and one of the biggest boost to their chances is a reference from us, and one of the biggest weighing questions on the references is about drinking.
Our best chance of getting some one housed is if we can say " to the best of our knowledge, this individual drank absolutely zero alcohol in the time they were with us"
Of course, some may drink and get away with being undetected, but if they are detected they lose their place, because they are harder to house, and we have waiting list of people prepared to abide by the conditions to get the best chance of housing.
so teetotal for the time with us is a condition of staying, yes.
And of course, many people are teetotal anyway, there are a lot of teetotal homeless Muslims, for example, as the two young people staying in my home right now.
In the larger shelter there are people who are alcoholics, people who my not be alcoholics but still drink, people who generally don't drink, and people who are teetotal, so a whole range.
It is certainly true that in some cases alcoholism is one of the factors in becoming homeless, or being unable to access shelter.
it is also true that in many cases becoming homeless and being unable to get into a shelter has absolutely nothing to do with alcohol