Lot of Institutions in Bangalore are meant specially for the IAS and KAS exams.You can find them throughout bangalore Specially in Vijaynagar which is called hub of competetive exams.
But I would like to advise you all that Most of the institutions just make Huge success claims which is False and your Hard earned money should not be wasted for such things.
If you are very serious about the exam then I suggest you to make thorough enquiry about the institution you are willing to join. You will get better information over internet than those institutions, its my personal experience. I do not like to mention the name of the instituion here, you can find the reviews for the same in lot of sites.
If you work hard little more you YOURSELF can gain better knowledge than that offered by the coaching institutes.
I had been in touch with quite a lot of people who went for coaching ( institues which claim great success in results) But we have realised they are not up to the mark.
But definitely you will have some advantages like:
-> You will get like minded people and serious candidates
-> you will be somehow in touch of the subjects whether study at home or not...
-> some basic idea of the exam and what books to read and other minor things.
Disadvantages:
-> You might get influenced by the trainer's dialogues: as some claim that if you are reading this notes 3 times is sufficient for clearing the exam... this doesnt make sense.
-> You may loose your own opinion of choosing an optional.
Be careful if you want success listen to your heart first, because it is you who has to read and understand and write in exam.
Dont get inspired by others who Show you general statistics saying this optional has been scoring... since scoring in any subject is possible if you have developed good writing skills :) only 10% accounts for choosing a subject, rest needs your effort.