Well, the movement that most inspires me in this regard are the Dutch Provos but there have been many other protest groups in the 60s to 80s in Europe that have used humor, chaos, spectacle and experiment to call for social change. Many of them combined bizarre theatre performances in public with a simple but radical political message and many lived according to their own ideals in anarchist communes that focused on sexual freedom, communal child raising, etc.
What made the Provos effective was that they could not be pinned down as
anything: they had no fixed agenda, no membership, no clear structure
and very few things were organised through large meetings or general
consensus. Instead, they were a lot of small groups who just did stuff
because they felt like it and they shared a few common ideals that were
experienced emotionally more than they were articulated. With hindsight they can be characterized as situationist anarchists but they rarely explained themselves like that.
Some Provos broke the law, some did not. That too made them unpredictable and effective. A lot of movements have split over legal vs. illegal techniques but the Provos used their diversity as part of their unpredictability. For example, when the Provos spread a rumour that they would poison the city water supplies with LSD, the police fell for it and paniced because they knew that some Provos were actually willing to do such radical illegal things.
Sources on the provos:
QueerAnarchism 