There is no definitive answer to this question, as it largely depends on the jurisdiction in which bingo is played. In some countries, such as the United States, bingo is not regulated at all.
In other countries, such as Australia, bingo is tightly regulated by national governments. As a result, it can be difficult to know for certain whether or not Bingo is legal in a given jurisdiction.
In general, however, it appears that bingo is generally legal in jurisdictions where it is not considered an illegal gambling activity. That said, there are a few jurisdictions – such as the United States – where bingo is considered an illegal gambling activity.
In these cases, Bingo may be illegal even if it is played within the confines of private clubs and/or social events.