Mikes Bike Tour is a great time:
http://www.mikesbiketours.com/munich/
When you are done with the Hoffbrauhaus go where the locals drink
http://www.augustiner-braeu.de/ It's a 2 min walk from the HBH.
If the weather is not so great check out the German technological museum - you can spend months in there....
Also the BMW veld and museum is worth a trip... It's close the Olympic Stadium.
ENJOY!