Admiral Club access (same day qualifying flight required - 1 Nov 2019)
 

I understand now that we need same day boarding pass for access. Does it mean you can not use the club if you are flying non-one world airlines when you have club membership or a CC that gives access?

Correct. Starting 1 November, boarding passes for same-day travel on American Airlines or partner airlines will be required for entry.1 Same-day priority verification cards will be accepted.

1 Any departing or arriving flight: marketed or operated by American Airlines, marketed and operated by any oneworld® partner carrier, marketed and operated by American Airlines or Alaska Airlines in any combination

All info here: https://www.aa.com/i18n/travel-info/...lub-access.jsp

Starts November 1. Same day AA, One World or partner boarding pass will be required for access. That requirement will include those with club membership.

I am a club member but I am clueless as to what a "same day priority verification card" might be. Thanks to anyone for filling me in.

Your situation is exactly the purpose of the new rule, e.g. flying out but not on AA/OW.