Is it true that if we are part of 1 group and go out with that group we shouldn´t mix with other people even if we know them? Kind of hard to express...

For example: I was introduded to somebody in a kina gecesi. The person was the only one I knew so far. Later on, somebody I´ve known for a long time arrived. She didn´t sit with me (maybe because I was with the other person´s group). Could it be true? Am I imaginng it?

Other example: I go to a cafe with 5 other friends. When I get there I realize I know some other people sitting in another group. I go say hi and come back to my group. If I sitted for some time with this other group what do my original group would think? If I brought the group to introduce to the group of friends I came to the cafe with what would they think? Is it weird?

Thanks! I really want to understand this part of the culture and be appropriate!

1. For example: I was introduded to somebody in a kina gecesi. The person was the only one I knew so far. Later on, somebody I´ve known for a long time arrived. She didn´t sit with me (maybe because I was with the other person´s group). Could it be true? Am I imaginng it?

Perhaps there was someone in your group that your old friend did not like to be observed together. So long as she saluted you and acknowledged your presence on her entry, she does not have to sit with you. You should have taken a chance to join her later - if only for a very short while - if you cared for her company.

2.Other example: I go to a cafe with 5 other friends. When I get there I realize I know some other people sitting in another group. I go say hi and come back to my group. If I sitted for some time with this other group what do my original group would think? If I brought the group to introduce to the group of friends I came to the cafe with what would they think? Is it weird?

When you see other friends at another table in a cafe, it is perfectly alright to say hello to them from a distance. You should inform and take leave from your original group, if you are going to visit the other table and your stay may exceed the time requıred for a reasonably short "hello". Notice however, that requesting your original friends´ permission to sit with others may make you socially correct, but not very popular.

Thank you Alpha! It helps me to understand a little more about the culture!

Thank you Alpha! It helps me to understand a little more about the culture!

Don´t think this much. Do whatever you want to do and learn from your mistakes.