Entrainment is an intrinsic phenomena of powered oscillators. That’s why entrainment is pervasive in the brain and body. For instance, heart beats are entrained by rhythms in the spinal cord.

But that’s also (probably) why most animals don’t entrain to a beat—it would be very dangerous to allow oneself to be entrained by external rhythms, even from conspecifics (same species).

Humans are also bad at entraining to a beat when stressed — you gotta relax to dance. That’s why a little alcohol (or other drugs) can vastly enhance one’s propensity to synchronize to a beat.

For more, see this recent article on human resonance phenomena: https://www.frontiersin.org/articles/10.3389/fnbot.2022.8504...