It's Sunday afternoon and 10 people are gathered for a theater rehearsal in a community hall in Lille, a city in northern France . Most of the amateur actors here did not get to know each other through the arts scene. They met during France's   "yellow vests" protests.   The grassroots protest movement was at its height in 2018 and 2019 when protesters wearing yellow, high-visibility vests, blocked streets across France in response to fuel tax hikes designed to partially finance climate