You've probably all been to all of these biergartens already but will recommend anyway:
1. Was in Hofbräukeller biergarten on Monday night (not the Hofbräuhaus). It's close to the Maximilianeum in Haidhausen. Great spot, lovely location, beer good (of course), food a bit pricey, but overall a lovely evening.
2. Was in Parkcafe biergarten last night. North of the HBF but a world away in terms of peace. Lovely green oasis with only a couple of nice buildings visible (Justizpalast etc). Very relaxed feel, beer good (of course).
3. Had the best kebab of my life last night. Forget Mamas (although that is good), this place is the bees knees. It's called gem's kebab house or summat, just north of Odeonsplatz on Gabelsbergerstr. Its not your average scummy kebab house: My kebab was, wait for it, a lamb and feta cheese and roasted aubergine one. Mmmmmmm kebabs.

All in all a good and productive couple of days.