Know their names? Have people over, start drinking, then start yelling shit at them.
“Louder Stephanie!”
“Fuck her in the ass Jeremy!”
“Jeremy, cum in Stephanie’s eye!”
“Stephanie you bad girl!”
“Stephanie, have you ever tried skiing airtight? Because I’ve got 4 more guys here ready to go!”
Or whatever the fuck their names are. You may have to do this once a month or so, but hey it’s fun!