Pubs in Dublin
I think you'd be better off finding out the names of some really nice pubs in Dublin and going to those. The touristy tours usually take people, as far as I know, to the Temple Bar area.. and it's not very pleasant and I wouldn't be surprised if prices there are higher.
Agree with zuriga's comment. The touristy tours are, well, touristy with the pubs full of, well, tourists.
Google will be a better friend than a tour company. Maybe search terms like "historic" , "traditional music" might help?
Apologies for not coming up with suggestions but it's some years since I was in Dublin and places change.