[While this was admittedly far from unusual - if a case ran late and he was working with someone like Babs or Donna or Wally or Roy, he definitely wasn't above crashing on a couch if need be - he'd still been raised to be polite, and the one major thing those four had that Ariadne didn't, excluding the superhero/vigilante thing, was that he'd known them since basically forever. Ariadne was a friend, sure, but she was still sort of a stranger, and he didn't want to be intruding on her space if she didn't want him to be.]
Spaaaam
[While this was admittedly far from unusual - if a case ran late and he was working with someone like Babs or Donna or Wally or Roy, he definitely wasn't above crashing on a couch if need be - he'd still been raised to be polite, and the one major thing those four had that Ariadne didn't, excluding the superhero/vigilante thing, was that he'd known them since basically forever. Ariadne was a friend, sure, but she was still sort of a stranger, and he didn't want to be intruding on her space if she didn't want him to be.]