There are numerous lesser beer gardens, but some beer gardens have 1000s of seats. Big beer gardens are available inside the Englischer Garten, on the Nockherberg, and from the Hirschgarten. There’s also a tomb monument to Louis IV the 14th-century Holy Roman Emperor, and find out a shoe-shaped impression at https://roughgem.de/die-bierrallye-dein-anbieter-fur-stadtfuhrungen-fur-gruppen-in-munchen/