Best south Indian restaurents in Bangalore:

1.Hotel Krishna Cafe,
 Koramangala/  One near IIMB , Bannerhatta Road Bangalore.( Pure Vegetarian ) , Tasty typical Tamil Iyer Food.
The

dosas and the other tamil dishes are very delicios .
Veg meals on Saturday and sunday are the highlights of tamil iyer cuisine.Serving is prompt and courteous.Wonderfull place to eat.
2. Hotel Ponnuswamy ( Koramangala ) Tamil Non- veg food- Mosty for non veg lovers
3. Malgudi ( Veg and Non - Veg) Best south Indian restuarent in Banaglore.
  Marathahalli and HSR Layout.. They also have a typical North indian restaurent at the top of Malgudi- which is the Dhaba- Good authentic north INdian food
4. Nandhini( Andhra Food)- They have combos in the evening serving Dosas and idly with VEg and non veg side dishes
5. RR (Andhra Food)- Outer ring road and Brigade road.
6. Woodys - Jayanagar and Commmercial street- Tasty Karnataka style food.
In woodys you get north INidan varieties too