Secular Overeaters Anonymous
Saturday mornings, 9 am Pacific time, 12 pm EasterWebsite

Or call in 669 900 6833 (US), 556 826 9800 (Mexico), Meeting ID: 811 3227 9574, Password: 462368. 
It’s up on the official OA web site…. and there are two other atheist/agnostic meetings listed there. Apparently you CAN search for them.
Also: there is a secular OA web site that lists secular meetings …