Ok admittedly, I haven't read EVERY post in this thread. But I've gotten the idea behind it and I feel like I want to say a few things.
The OP has said he's in DC. If we're still talking about a potential spot for the OP, then you have to take some things into consideration. One, it's called chocolate city for a reason. Liara, you stated earlier that there are many more whites than blacks. In the US, sure, but that's not really the case here in the District. Also, some of the best 'black' clubs here have dress codes. So, while I understand the basis of your argument, it doesn't apply as well here because of the demographics.
That being said, there ARE several areas that are considered 'white' areas. Georgetown being one and Adams Morgan being another (although AMo has a much stronger foreign contingent). Some of these places have dress codes, some don't. I have personally been turned away because I was wearing sneakers, and that's fine. I have yet to see any clubs with dress codes like the ones you're describing (no baggy shit, etc.). The dress codes I have seen a re of the no jeans no sneakers variety. I don't think these are inherently racist like seems to be the argument. A business can't foster an atmosphere of sophistication when its clientele are wearing whatever the hell they want. This includes baggy jeans, but it sure as shit also includes flip flops and whatever American Eagle bullshit yuppies wear.
So maybe dress codes CAN be racist, but they have to be specifically tailored to be such. I don't think that's what the OP is trying to do here. And OP, without knowing exactly what type of place you want to open, it wouldn't even really be appropriate to discuss dress code. (If you want a beach theme, these last four pages are moot, for example.)