I would like to recommend two pubs where you can try out testing real ale against decent lager until you fall over.

First up Fat Cat - http://www.thefatcat.co.uk/86index.htm

One of the world's great boozers. (Apart from me that is!!)

http://www.devonshirecat.co.uk/content.php
is brilliant for bottled beer.

Two good reasons to live in Sheffield