If im going to be consuming alcohol this weekend is this eating plan ok?

i havent drank alcohol in monthes ever since i began watching my weight. this weekend im going to visit a friend in albany for my bday and i cant not drink, i dont want to be that boring l;ump. i know they say if your watchign calories to consume clear liquor and mix it with a 0 calorie energy drink or crystal light, which i intend to do. but eating wise..if i bring zone bars(200 calories a bar) and only eat those for lunch and dinner, will i be ok? or will i be consuming a lot of calories?..i'm really freaking out bc i been not eating that great lately and im trying to get myself back on track, and while im in albany i wont have access to working out for 2 days.