I get a post-booze drop and so I bolus for beer for the first half of the evening and then stop to allow my BG to climb up (later to drop down again). I also have to be careful to remember to lower my basals when I’m walking miles afterwards to find a taxi – if I’m pissed I usually forget to do this.
I think the only way to do it is to experiment quite a lot and find out exactly how it effects you! 