Page 31 of the Big Book
"Step over to the nearest barroom and try some controlled drinking."
My answer is that I could go to the nearest barroom and do some controlled drinking. Within a few weeks, I will be back to uncontrollable drinking on my own so I do not engage in controlled drinking. Too many relapses and two DUIs proves that I can never engage in controlled social drinking.
So when I go the barroom or a camping trip where there is excessive drinking (which is only a few times a year), I avoid drinking because it will create a chain of events that will undo four years of sobriety. I have relapsed several times since 2009 but I have not drank socially since October 2008.