The best way to find a petanque club is to use the petanque club search page.
The FPUSA has a list of FPUSA-affiliated clubs but of course non-FPUSA-affiliated clubs are not on the list.
There are other lists of pétanque clubs on various web sites, but most are not maintained, so they are out-of-date and contain many dead entries. Petanque America no longer maintains its map of petanque clubs. The Playaboule list was never seriously maintained and is totally useless.