Possible Clues:

• Char may be seen at this social event
• An afternoon trip?
• Civilised party? Notice South African one dividing support
• New cadet penning article before English social event
• Afternoon or early evening social event
• New date, one around end of autumn, for social event
• Afternoon function
• Social event in 'No, No, Nanette'
• About end of afternoon, one goes on date, waltzing here?
• 4 p.m. social event, maybe