If you say your game plan is to just kind of cruise and not really get hammered, then I really see no harm. But that's just me. Take the energy drink before you go and check the nighttime meds you take for specific alcohol interactions.

I personally am a fan of the vitamin supplement that is the Super B Complex. Its the same thing that's in those energy drinks but without the sugar so you wont get jittery and the price of a bottle of 50 vitamins is the same as one or two energy drinks. Just throwing it out there.

Also, drink plenty of water before, during and after. In my personal opinion, it's ok to have some fun if you know your limitations and feel as though you could stop yourself before you get too wasted. Stick to what you know and don't let anyone buy you shots.