So, first off. I live and play in Colombia, so things are a little different here but most everything still applies. The biggest cultural difference applicable to my question is that the Colombian men here (as well as the women) are known for cheating on a regular basis.
Girls often ask me: What did you do yesterday? or Do you have a lot of friends (explicit friends who are girls)?
I see a different girl almost every day, but don't always close. So to answer this question, I can either be honest and say I was with someone or deflect the question in some way.
If I tell her I met with a friend ("amiga" - it's explicit I'm talking about a woman, not a man), it seems like it should show social cred and value. It also has the potential of creating some competition.
However, I've noticed it sometimes has an effect of moving their perspective of me to more of a friend-view. They think: he's already dating someone... This happens even with the 9's and 10's. Maybe they don't need to compete since they have many men coming onto them so it's less valuable to them to date someone who they will have to work for.
Deflecting with something to build interest is another option, but it seems like there should be a way to show more value in this situation.
I'm going to just straight up ask the next girl why next time it looks like I lost value for mentioning dating other women.