A güemilere (also wemilere, tambor or toque de santo) is a public ceremony for the orishas in santería, with batá drums, song and dance. Sometimes an orisha takes possession of a believer.
According to Amira & Cornelius, santería has two kinds of public music ceremonies: the bembé (also tambor con güiro), with congas, and the güemilere, with batá drums. Both honour the orishas, for example on an orisha's feast day, on the anniversary of someone's initiation, or in gratitude for a favour. Balbuena Gutiérrez lists the güemilere (Tambor, Wemilere or Batá) as one of the celebrations for the orishas in Matanzas, with consecrated drums (añá or de fundamento) or unconsecrated ones (aberikulá).
According to EcuRed (on drum feasts for the orishas), each orisha has its own rhythms and its own dance: Yemayá's imitates the waves, Oggún's the cutting with the machete, Ochún's the way she preens before her hand mirror. The dances are seen more as prayers than as "dance" in the Western sense. An orisha may "mount" a consecrated priest; when it mounts an uninitiated person (aleyo), this usually signals that the person should be initiated. See also the orisha dances.