You should check out the thread about living with non-primal family. A lot of the same tips will translate.
As for me, I simply eat what I eat and my friends/housemates and I do not coordinate our social events around food. They know very well that I will lead them all over the city to find the best place that serves meat and salad instead of pizza.
ETA: OOps, it was "Living with non-Groks" Thread is here: http://www.marksdailyapple.com/forum...With-Non-Groks