lol. Ahh so surviving a day/night out with drinkers. Only piece of advice is pace yourself and eat well (if you are buying the round, buy a shandy and hope nobody notices, at least you get one pint *off* then ).
And the get excited bit - well - getting excited (in a happy good way) can be beneficial in shrugging off the downer effect of booze and can enhance the euphoric side. A bleak mood will sometimes enhance the downer effects (make you sleepy. slur speech - fall over - lose consciousness etc ). There is a biological reason behind it (if you are interested check out reticular activating system), but think that will be beyond the scope of this conversation :d
Nice find on the beer btw, don't down too many of those
I think the worst case for me has been drinking little bottles of Duvel (I think that was the spelling) in Holland - thinking they were just little standard beers.... 6 bottles later and I was finding I was having a nice conversation with he carpet!