"Their website says:
Baggy Clothing (half the white guys I grew up with), Non-Military Issued Camouflage (my redneck brother-in-law), Air Jordans (half the white guys I grew up with and several white guys in HASMSP), Air Force Ones (half the white guys I grew up with including me plus several white guys in HASMSP), Polo Boots (half the white guys I grew up with including me), Timberlands (half the white guys I grew up with), Solid Tshirts (half the white guys I grew up with, my redneck brother-in-law, and 20% of the white people I go to church with, Sports Attire & Offensive Clothing (literally covers 80% - 90% of the people I know including me)"
The explanation about Jordans seems more than plausible. I bet the same could be said for Polo boots and Timberlands. I have several guys who have worked for me in the past (white, black, and Mexican) who can attest to certain solid colors meaning certain things that can cause conflict. It's perfectly reasonable, then, to prohibit such a thing if it could pose enough of a threat to the club's patrons. I've been in bars where Tech fans (white) went after Aggy fans (just as white) for wearing #12 jerseys.
Should I go on?
If you see something here it's because you want to see it; not necessarily because it really exists.