Don't scare too much! In England, queue is something habitual, and even at the Fabric it seems so long, you will move fairly quickly.
Usually you will not be queued for longer than half an hour, the ideal time to drink a beer, for £ 1, that you can buy at the "off licence" in the corner.
The Fabric is the classic club where you can go "with your eyes closed", the quality of the music is absolutely guaranteed, you can just think that the DJ are Jamie Jones, Matthew Dear, Steve Bug and Horsemeat.
During a normal night, in the 3 rooms, there are DJ and music very different; you can decide to go from house to drum 'n bass, perhaps going to the bar to take a vodka-tonic.
Look the site for Fabriclive updated program .
Years ago I had a car full of CDs, most burned, I have to admit, with the Fabric historic nights; and the first time I went, I was excited. It will be like for you... I'm sure!
Underground tube: Farringdon



