The phrase "counts heads" refers to the process of tallying the number of individuals in a group or gathering. One antonym for this phrase could be "disperse," which suggests the act of scattering or separating a group of people. Another antonym could be "divide," which implies breaking a larger group into smaller sections. "Exclude" could also be an antonym, indicating the deliberate exclusion or omission of certain individuals from a group tally. Conversely, "unite" could be another antonym, denoting the coming together of individuals to form a cohesive group. In any case, the choice of antonym will depend on the context in which the phrase "counts heads" is being used.