First, if they are married to 8:s, that means that they aren´t *that* beta per definition. Beta and “family man” aren´t synonyms in my lingo, rather:
Alpha: Attractive man to women. (8-10)
Beta: Moderately attractive man. (5-7)
Omega: Actively offputting to women. (1-4)
But sure, that´s the good thing about alcohol (and the surrounding social strictures) - it allows one to maintain multiple personalities.
Especially useful for subdued cultures like the Swedes or the Japanese, even in non-sexual contexts. Work hard and shut up during the day, get wasted and say what you really think about your boss after hours, in a socially accepted fashion. What´s not to like?
In other contexts, I've seen it expressed differently:
(1) Alpha: someone who attractive women are willing to sleep with even without commitment or financial support.
(2) Beta: someone that attractive women are not sexually attracted to, but will keep around for financial support.