I lost 2.5lbs, no idea how I managed this! First week back on SW though.
Anna Claire, people I know who go out drinking at weekends whilst on SW do things such as making one drink last longer (taking less sips), having a vodka and diet coke as opposed to normal coke and one friend has one alcoholic drink followed by lots of diet drinks or water. If you get the munchies, try to choose the healthiest option, or share something with a friend rather than eat it all yourself?
I'm not a drinker/sat night out person myself though so sorry if this isn't helpful.