I'm trying to say that going to restaurants as a group of people and having in-jokes does not qualify as "imposing your culture" in any way. These things routinely happen at companies that have few to no Indians, they just take a different form.
Also, are you really claiming that if you moved to Bangalore, and had 2-3 coworkers from your hometown that you knew and shared cultural ties with; that you wouldn't tend to hang out together at lunch?