So what do you do on Saturdays instead? Well, I have crafted a nifty little itinerary that steers clear of the weekend crowds, and yet still gives you an authentic "Munich" experience.
Head over to Haidhausen. This is a great, but often passed-over, part of Munich. Eat breakfast at Cafe Haidhausen to get an "Old World cafe" feeling. You can have a traditional Weisswurst breakfast or go for one of their other continental breakfast plates.
After breakfast, take a walk along the Isar river. There is a paved bicycle and walking path that runs in both directions along both banks. I recommend walking north along the east bank and just taking in the views and peaceful riverside escape in the middle of the city (see photo above).
When you reach the Angel of Victory Monument, veer off to the right down Prinzregentenstrasse and stop for a coffee at Bäckerei Chocolatte. Sit at one of the tables on the street, wrap yourself in a blanket, give the owner's dog a pat on the head, and enjoy a coffee (with a chocolate cookie or a piece of cake if you're up for it). It's a super chill place, and the neighborhood (and hence view) is entertaining. Despite it's unassuming facade, the bakery attracts a crowd of chic Münchners who are out to seen and be seen.
Walk back down Regentenstrasse toward the river. I know I said to avoid the shops, but since you will be passing by, you might as well pop into the Käfer Department Store really quickly, just to check it out. This is Munich's poshest department store, known for it's gourmet foods. It's a really great place to buy gifts too, with all kinds of food gift baskets, cooking utensils, and Bavarian-styled packages.
Then continue your stroll north along the river and head up most of the length of the English Garden until you reach St. Emmeram (it's a bit of a walk, but very pleasant). Settle in for a long afternoon lunch. If it's summertime, pass the afternoon under the trees in the beer garden. If it's not warm enough to be outside, settle into the cozy, warm, wooden interior. Order a Brotzeitteller and a beer and don't worry about the time. Just linger.
St. Emmeram 41
When the afternoon has faded away, and you've stuffed yourself with beer and bread, and actually you feel like you've had a proper German culinary tour (Viennese-style cafe, typical Munich street cafe/ bakery, and finally beer garden/guest house), decide to head back towards town. You can hop on Tram 16 and ride it all the way in to the Hauptbahnhof. It's Saturday night, so you probably want to go out and enjoy some Munich nightlife. But first, head back to your hotel to freshen up.
Head over to the University District - take the Ubahn to Universität. There are lots of bars and restaurants in this area to choose from. The main artery is Türkenstrasse, and the streets that criss-cross it, such as Schellingstrasse and Theresienstrasse, also have lots of neighborhood bars and cafes. Just choose a place that looks fun and crowded (not hard to find!) to start, and bar hop your night around the neighborhood.