A little exercise you can do to project your voice in loud club.

SPL Meter
Get yourself an SPL meter - you can either get one off Amazon or you can download an SPL meter app for your smartphone. I use SPL Pro on the iPhone.

Turn on your stereo or home theatre and crank up the music until your SPL meter reads about 90 decibels which is the typical noise level in a club. Then try doing your opener and other material. If you can move the needle above 90 decibels you are speaking over the music.

Also if you want add another dimension - in a typical aa situation your heart will be racing. Do 15 pushups before you are about to run your material.