I think I've been forced to go a couple of times. Personally, I'm not in touch with my Si. I don't even know what 'sensing' is, to be honest (lol jk). I'm pretty socially anxious as well! I think that's a 6 trait by the way.
Well, I'm kind of stereotyping here, but they might seem kind of lonely or standoffish at first glance. They're often pretty engaged in Ti so they might seem like they're not registered with other people/their surroundings. Basically, look for the guy/gal that looks bored/uninterested and seems...
Yeah INFJs seem to bring Ni in ENFPs and INTPs because ENTPs/ENFPs/INTPs/INFPs have a bunch of crazy Ne ideas and need INFJ's help to make them happen!!
Hahaha I guess INFJs are extroverted introverts. I don't even know many INFJs online/real life so yeah I base a lot of my INFJ observations from people on this site like you!!! Lol
I have a personality cafe account but I can't really get the hang of the website. It's less organized than the others, you know? But I still like how it has sections for every type. There aren't many forums dedicated for SF types, for example, but each type has its own group on cafe