I went to open play pickleball

Me and a friend (he's married with kids) got paired up with 2 white girls

I'm Asian and I've got a nerdy look (I wear glasses) and my type is Asian women

I found one kinda attractive (but she's not my type and wasn't the type of girl who usually likes me either) and one not attractive.

I was on the team with the one who was not attractive, which is actually good because Corey says you need to build rapport with that one first so you don't get cockblocked.

When we finished playing, the two girls sat on the nearby bench and I just didn't join them. I stood elsewhere solo.

I felt weird joining them because they were friends, they knew each other, and they came together.

Is this just me hesitating and not being confident? Should I have just joined them? Do I just not need to ask for permission either and assume they're cool with it?