Check SFFuncheap for confirmed start time, but this one is landing at Lake Merritt — free to attend, bring clothes to swap, leave with someone else's. The format is straightforward: you haul in a bag of unwanted items, lay them out, browse what others brought, walk away with something new-to-you. The picnic element means people are sticking around, not just transacting and leaving.

What makes this different from a generic swap is the curation that comes with a community-specific event — sizes, styles, and general aesthetic tend to cluster in ways that make the browsing faster and more useful. Lake Merritt is BART-accessible (Lake Merritt station, about a 10-minute walk depending on where around the lake they set up), and the park itself has plenty of flat grass for blankets. Bring a bag you don't mind carrying the swap haul home in, and bring more than you think you'll give away — the ratio of givers to takers matters.

If you've got two hours: drop your donation bag first thing, do a full loop of the swap tables while others are still laying out, then grab a spot on the grass before the picnic crowd thickens. The early arrivals get the best selection.