First generation immigrants

As a first generation immigrant we face a big cultural challenge in life. I am sure our kids are much more cooler and they won't see such a cultural barrier.
We had a lunch get to gether at our new start up company this noon. I am the only middle eastern and with a Chinese guy ( who was absent ) we are the only immigrants there. I could not stay there just because I could not fit into that group. The jokes the interests and all the rest are not simply mine. Sometimes because I don't want to be rude or because after all they are nice guys I hang out with them and participate in collective joking around and stuff but it is not me.