Shouldn't the members of the enclave proactively reach out themselves, then? As the host country has tried to make things more comfortable for them to start with.

That seem to be the major difference between Western and non-Western countries; we're more cognisant of things like racism/being excluded and have taken steps to try to resolve it - you do not get the same in many other countries at all.

It seems it's much more acceptable to be exclusionary and racist if you're non-white, sometimes.

> Maybe next time the OP should show some curiosity about what their coworkers are joking about, and shyly ask for a seat at the table. I have done it plenty of times.

Yep 100% this is the only decent solution OP has barring leaving the company. It leads to really interesting conversations and you get to learn a lot about a huge portion of the planet's population. Some people go out of their way for these experiences. But it also shouldn't be forced on someone who just wants to collect a paycheck.

When an ethnic group makes a tacit decision to form an enclave and exclude others, there is no "learning to navigate the subculture". Either you are pushed out or you find the leverage to make them stop doing that.