I think it depends on the events and functions that he must be referring to. I know of a lot of events, functions, and even AA speaker meetings -- where non-alcoholic, non-AA people attend, especially if they're in a relationship with someone that is not AA. Many of the people that host AA events (not all, but many), see the benefit in hosting events where "a family" together, or a "couple" together -- can benefit in the events. The true spirit of AA encourages healthy family and healthy relationship experiences.
Often, on the other hand, non-AA's do not want to attend the events or functions. So, it's a mix that's usually one way or another combined.
I hope that helps.