The gesture known as the "motorcycle wave" or the "biker wave" is a common practice among many motorcycle riders as a way to acknowledge and greet each other on the road. It typically involves extending a hand or raising a couple of fingers from the handlebars in a wave-like motion when passing another motorcyclist.
It is generally a friendly gesture shared among riders of all backgrounds and affiliations as a sign of camaraderie and mutual respect. Riders often wave to acknowledge each other's presence and to foster a sense of unity within the motorcycling community.
While some motorcyclists may choose to wave at members of motorcycle clubs like the Hells Angels, it ultimately depends on the individual rider and their personal preferences or affiliations. The decision to wave or not to wave is entirely up to each rider and is not mandated by any specific rules or protocols.