Here is your manual on what to do on Sunday. Requirements: you have to be bored and the weather has to be bad. Make an appointment with one of your best friends. Put on clothes. Take the Metro to Schwanthalerhöhe or go to Parkstraße 2 with your Vespa (depending on the weather) to Ladencafé Marais.
Stay inside, ’cause the weather is still bad, and hope that someone is getting up, because it’s really crowded and all the seats are occupied. One way to get a seat is to buy it. Because all the furniture inside can be purchased. Afterwards you can say to someone sitting on your chair, which you bought five minutes ago, that they have to get up. But of course that’s not polite and the other problem is, where will your friend take a seat? So be patient and wait until someones gets up. It only takes about five minutes.
My conclusion: Order coffee or one of those delicious paninis, e.g. with Scarmoza, mushroom paste and ham. Sunday is saved. Now look outside (do this behind the display window), order another coffee and be happy as long as you want.