Offbeats refer to moments or things that are unconventional, different, or out of the ordinary. Therefore, antonyms for offbeats are words that mean conventional or normal. Words such as ordinary, typical, common, regular, standard, mainstream, and traditional are all antonyms of offbeats. When something is described as ordinary, it implies that it's usual or routine, while regular and standard indicate the expected and the norm. Meanwhile, mainstream and traditional refer to things that are popular, widely accepted, or derived from established customs or beliefs. Overall, the antonyms for offbeats describe things that are familiar, expected, and conventional, rather than unusual or eccentric.