Sorry you found the group a little odd sax. I'm a salt and believe me there are some odd ones around,the irony of which is not lost on me (communication specialists who are themselves strange communicators!)
In fairness,it may be worth you knowing that social skills are extremely difficult to 'teach' to someone who is having difficulties in that area. It is a real burning issue within salt at the moment as to how bbest impart this knowledge,social skills being so hard to define,yet we all know instantly if and when they are not quite appropriate.
As a result,sometimes the therapy in these groups has to be overt and overstated in order to get the message across.
BTW, if ds had asked such a question it shouldn't have phased her in the slightest!
I once ran a group for teenagers with AS. A new girl arrived alte and one of the first questions she was asked (after perfunctory intros and fact finding) by another lad was if she had sex with her boyfriend!!!!!
Aaaaaaarhh!!!!
It was funny,in retrospect,I have to say. Luckily, as she had AS,she didn't mind,but we spent a long time talking about why this might not be such a great way to talk to a new acquaintance.
Stick with it. Things should improve.