Alcohol while breast feeding

Not looking for judgment here lol I was just seeking advice on how anyone on here goes about drinking while breastfeeding. I'm drinking with a few friends tonight for the first time since my LO was born. (Not planning on getting drunk, we are staying in & having a couple of drinks) I have some pumped milk, but how long should I wait to feed him myself? Again, I'm only planning on having a couple. Im just nervous on how to feed him. Thanks in advance!