Pump and dump is an outdated thought now a days. You can keep the milk as long as it’s refrigerated. You can also feed the baby when you get home! Have a good time!
As long as you can drive (under legal limit), you can breast feed.
I personally pumped and dumped just to keep my supply going then fed from the boob the night after (so slept after drinking then waited a day then fed that night). I felt it was sufficient enough. That was with my 5 week old. Enjoy your night off just make sure to remember to pump so you don’t lose supply x
If you're worried about feeding after you've drank you can always keep it for milk baths?
Midwife told me that as long as you’re not too inebriated to look after a baby, your milk will be fine- no more alcoholic than orange juice we’re her exact words!
You don't need to pump and dump when having a couple of drinks. There is still some advice about waiting 2 hours after a drink but the amount of alcohol in your blood then passing on to baby via milk is so little there it's going to have minimal impact. It's more of an issue if you're regularly drinking alcohol. My motto is "If you can hold the baby you can feed the baby" so if you're properly going out and getting drunk you'd probably not want to feed that to your baby. I went to a wedding on the weekend and fed my baby after 1 or 2 drinks, but when I'd had quite a few in a shorter amount of time I used expressed milk in a bottle instead and pumped and dumped. You're going to have to pump regardless to keep up your supply.
Pump and dump
If you are going to be drinking then pump and dump. For each drink you have to wait at least two hours before feeding so if you have two then four hours and so on. if you are going to drink a lot then wait 24h before feeding.