semi-social 

Semi-Social is someone who socializes in any setting with those only that have common knowledge to that person and remains anti-social to uncommon people that they have no attraction to. Someone who is semi-social is wise with their pick of friends because they examine the person to see if they are friend or foe.

The semi-social man went in public, ignored the annoying simpletons, and engaged in a conversation with a couple of eccentric free thinkers.

semi-social by superbipolar420 May 24, 2016

semisocialize 

To attend a large gathering of people where mingling with strangers is encouraged (e.g., a party or bar) but converse only with the small handful of people one arrived with.

"Those parties are bullshit for meeting people. Everyone just shows up and semisocializes in their own little cliques."

"The guy throwing that party might be douchey, but let's go anyway. We can drink his booze and semisocialize."

semisocialize by maxkeepsitreal1 June 12, 2008