Breastfeeding and alcohol

Im planning a night out in a few weeks for a friends birthday & my daughter is EBF, (she'll be about 6 weeks when I go out) obviously I'll pump & make some bottles for her to have when I'm out, but I'm worried about when I can breastfeed again. I stopped bf'ing my daughter after 4 weeks because I didn't know when I could feed again after a few drinks and I really want to continue feeding for a lot longer this time! Obviously I don't know how many drinks I'll have but it'll most likely be vodka.. Has anyone got any advice?