The legal drinking age in Mumbai, as in the rest of India, is 21 years old. This is the age at which an individual can legally purchase and consume alcohol in licensed establishments such as bars, pubs, and restaurants.
It is worth noting, however, that different states in India may have different laws regarding the legal drinking age. In some states, the legal drinking age may be higher or lower than 21 years old. As such, it is important to check the specific laws and regulations in the state in question before consuming alcohol.