A real, recurring weekend brunch meetup run by the "Chiang Mai Professionals, Expats, and Digital Nomads" Meetup group — an active community founded in 2022 with over 3,200 members and a 4.8-star rating.
This particular session is held at STORIES Ping River; the group typically charges a small cover (around 50 THB for brunch events) to reserve seating.
The group runs several other recurring sessions beyond brunch — board game nights, a running club, and a writing/poetry club — check their Meetup page (linked above) for the current week's full schedule, since exact dates shift week to week.
Source: Meetup — Chiang Mai Professionals, Expats, and Digital Nomads (3,284 members) ↗