Benny, this is a subject that is close to my heart! I'm 28 and have a fairly active social life. I will go out for meals or on the drink once or twice (or more sometimes) per month. I love beer, but now I avoid it because it is incredibly high in GI; shoots my levels up almost immediately. If I'm just out for one or two I will inject as a pint will have around 12g or carbs in it, but its a lottery so as I said I avoid it now. This isn't a good idea when your going out to have a skinful as the alcohol and insulin will lower your levels and I imagine it would be easy to lose hypo signs if your bladdered. There are low carb options, Coors Light or Muller light, but they still cause a rise.
A friend of mine runs his own home-brew shop and has found some zero-carb home-brew. Apparently you can add a specific enzyme to the brew that will remove the carbs, but I've not tried it yet and probably wont to be honest!
I now tend to have wine, a spirit and a mixer or a nice whiskey as these do not cause a rise. I also test frequently whilst out and carry a stash of dextrose just to make sure that everything is ok.