Psychotherapeutic group

Hello schema specialists.

 

I was wondering if there is an Entity for the scenario of a
psychotherapeutic group offer.

 

That's a therapy taking place in a group setting. There's a topic to the
group (as 'smoking stoppers' or 'binge eaters') and the group meets on a
regular basis.

 

I wasn't able to find out how to describe an offer like this using
schema.org language.

 

Thanks! Chris