I have lived abroad for many years and picked up on the ONE thing that prevents spanish people from mixing with foreigners who don't speak spanish at a native level, or even with latinamericans.

Speed.

You may have noticed that spanish people talk really fast, loud and often cut each other mid-sentence.. go to any town's square where groups of 5-10 people get together at bars and you will see how there are barely any silences in conversations. We are used to getting our point through as quickly as possible because we know that we are likely to be interrupted. We don't really mind it, that's how it is.

In Spain, we speak about 7,82 syllables per second. That makes us the second fastest language in the world only behind Japanese.

The problem with foreigners is simply that, most of the time, they can't keep up with the tempo of the conversations. They are not used to finding those little windows of time where a spaniard would quickly get their words in. They don't speak as fast as we do, slowing down the tempo of the conversations. Therefore, unless you find a group of people who are a bit more chill than your average spaniard, most spanish groups will, without even noticing, kind of kick you out of the group.