Sometimes 11 pints but it can lead to brewed beers of unpredictable characteristics. You might even get some skunk in your product. If my missus is lucky I might get my junk in her, or at least that's my logic at the time. Truth be told I'd be lucky to bang a door in that state.
A ratio of 0.25 for a 22L batch is better but you can still be on shaky ground even at these levels. I try not to wear wobbly boots in the brewing area as it is not a safe practice.
Perhaps if it concerns you, you should save your drinking for flameout additions? Or maybe a single big whirlpool drink? Certainly late drinking leads to a greater perception of flavour, or perception in general (as oppossed to regular high volume drinking before and throughout the brewing process).
Hello Spinner, I am glad you came in.
Now that is a good question!
Depending upon how you look at it.
I know chaps who are fond of drinking straight from their fermenter, post fermentation, so I would say that the drinking ratio would certainly be relevant to bottling or kegging volumes and thus should be a consideration for deciding what the batch volume should be.
In the BS2* scenario below, I would advise a larger batch size.
*Not based on 'Beersmith 2' but based on '******** 2'. In fact, this whole post is based on my BS2.