add Carlton club in Bourke street to thatYou haven't really told us what you're looking for or which part of the CBD you're after.
I think you'll find more pubs down the Spencer St end of the city, but I think the pubs are cooler towards the Parliament end.
The Imperial roof top.
Spleen, the ultimate dive bar.
The Crafty Squire on Russell St, which is cool and has a selection of great beers.
Rooftop Bar on Swanston St, which has a great view of the city, a great atmosphere, and is a great place to get a feed. (Just take the lift, not the 7 flights of stairs!)
Globe Alley in China town, which looks like sh*t from the outside but is such a cool place. Free pool table too, and free live music most days. And by now you're at the corner of Swanston and Little Bourke, so you can go wherever you want from here.
All of these places are within a block of Bourke St (ie. between Little Collins and Little Bourke). Unless you and your crew are w***ers, stay away from Collins St.