I have a theory (and its just a theory).
As attraction is something that has remained unchanged for tens of thousands of years, the type of body that would be most useful/most likely to survive back days when we lacked self consciousness or intellect (i.e the caveman days) would be the most attractive to women, even today.
I believe this body would be a compromise between speed and strength, hence "bodybuilder" types and "skinny" types are not seen as attractive. I think the most attractive body would look something like this:
http://www.armyofmom.com/aussieswimmers.jpg
Obviously these guys both have very good genetics, and not all of us have that. SO, bodybuilding can give one a body comparable in strength and speed to these guys. The genetics may not be quite as good, but the body is still as good:
http://www.muscle-fitness.com.au/sei/s/1789/444.jpg
Anyone who says it doesn't help is kidding themselves.
Anyone who thinks its the deciding factor is kidding themselves.
On the 1-10 scale, I'd say bodybuilding can move you up 1-2 points maximum, so I think any aspiring DJ should do it, unless you have awesome genetics like the guys in the first pic and don't really need to, or are ridiculously good looking. One things for sure, it certainly won't hurt your game!