[user104658]

I doubt they'd be at any sort of risk with only a couple, however I certainly don't think theres any NEED to be consuming alcohol, especially if you've been left in charge of someone else's children.

For parents, I'd say a couple occasionally / on an occasion like new years, birthdays, Valentine's day etc. Is totally fine but I think it's... Questionable... If it's every night or even several times a week. Or even every weekend. I don't think regular alcohol consumption should be as normalised as it is.