It's not that tough. Used to be I screened everyone, coordinated a meeting point where we could grab snacks and drinks, and brought gear to use at the club we attended.
Hosting in a bondage club meant we even got occasional participation from folks outside our event set. It was cool Last gathering was 2007 or 2008. Two munches after that, and then San Diego started theirs and LA just went dark.
Pick a location for lunch on a Saturday. Post a call to munch in the Gatherings section, General West Coast. Meet up. My core crew was less than a dozen people. NEST started with 8. It restarts when you socialize. Bondage clubs and the homes of members provide play areas, which is all good if consensual.
They happen all over the country now. In England and Australia too. You can do this.