Famous beer cellar right on the main shopping street. Head north from the Marienplatz towards Karlsplatz and it's on the left. The Augustiner Keller is a favourite of mine if you want to real Munich atmosphere and not something put on for the tourists.
I went there with my family recently (April 2013) and was surprise to see that for every day they now offer some kind of vegetarian alternative. It's still pretty basic like egg, spinach and chips but hey.. they are actually offering real vegetarian food. Amazing for Munich beer cellers.
Address: Neuhauser Straße 16
Tel. 089 2 60 41 06
A touch of the Oktoberfest all year. Very close to the Marienplatz. Just to the south right of the Marienplatz, opposite the Rock Cafe. There's also a beer garden out back too which is nice on hot days. It's quite touristy, but if you want a feel for the Oktoberfest at any time of the year, it's a good place to go.
Address: Am Platzl 9
Tel. 089 22 16 76
Not far from the central railway station with a nice beer garden
too, also within walking distance of the English language Cinema.
Nymphenburger Str. 2
Tel. 089 52 60 21
A beer cellar in Giesing.
Address: Hochstraße 77
Tel. 089 48 32 74