They are only 'casual' acquaintances. [=they know each other but not very well]
She takes a 'casual' [='nonchalant'] approach to her homework.
He was dressed 'casually' in jeans and a sweatshirt.
(..) and not very expensive. And as time passed, Vonnie did start to succumb to Bobby's charm and loving attention. And what began originally as as a casual friendship blossomed into a genuine romance. Let's move to New York. What? Yeah. What I really would like to say is: (..)2016 Café Society