Stag Do Coincides With Work

Looking for some tips. I am coinciding a stag do next week to Barcelona for my cousins wedding. I am also planning to go into the local office twice in that week. I know how these stags work out sometimes and I can forsee me leaving a club quite late into the morning and going to the office hours later. My question is, which drink will be least detectible on me as I can’t see myself abstaining that week. I figured wine but I’m not sure, any tips?