baggersup,
No Captains are not running any cabin crew briefings and never have unless they were working as the SCCM during the strikes.
During the strike the company asked the flight crew to have a presents in the cabin crew pre-flight briefings. On worldwide some did sit in on the briefings which are done by the SCCM.
In E/F some sat in but most just popped in to say hello as they do now and as they always did before the strike if they are around.
They were more just giving support to the crew working and of course any VCC's and checking we were all happy. During the strike most of us ( C/C and F/C) walked out to the aircraft together but again this was just to give each other support.