Well, if you're like me (and a lot of other folks here), it simply won't work. You won't be able to maintain your "one night per month" or whatever permission slip you write for yourself. The next day, you'll wake up hung over, your motivation shot, your head pounding, full of regret and your anxiety levels off the charts over the thought of having to wait an entire month in order to do it again. You'll end up deviating from your rules - "just this one time". And again. And again. And again...
My advice? Find something you enjoy more and focus on that. Celebrate your weekends with that instead.