Ok, I'm a black guy, so I have an understandable bias. This is my feeling on this issue in general.
VH1 is a purely media-channel. The pick-up artist is meant to appeal to standard media stereotypes, that why they picked the nerdiest looking guys to "transform".
They could have easily picked some fit, well-to-do MMA fighter who can't get any because he doesn't have any game. There's plenty of those in the US. Instead, they picked the kids who got punked in high school.
In popular media, there's two types of black guys: the ultraviolent, irrationally emotional types (check any season of the Real World or Big Brother, the token black guy is almost always crazy/violent), and the nerdy Urkel type (hyperbolized by Urkel and Carlton from the Fresh Prince). Lately, the nerdy type is slowly being weeded out of existence. The last major movie I've seen with a "smart" black guy was transformers, and he was an overweight computer hacker living with his mom who spoke in absurd ebonics and had a fat, freeloading cousin.
Since the nerdy Urkel media meme is disappearing, the PUA producers had no reason to consider such a character in their show. That's because VH1 is a bullsh!t channel. Watch Keys to the VIP: they have black guys from the carribean, Indian club promoters, Italian carpenters, native Canadians and immigrant guys, just like actual demographics reflect. VH1 is just trying to appeal to the MTV/VH1 crowd of 18-21 year olds who watch sh!t like the Hills and the Girls Next Door, both shows that unrealistically portray upperclass California as uniformly blond, caucasian, and douchy.
I'm not making some prescriptive racial argument about the US. I'm just commenting on the portrayal of race in the media. The media is lagging behind actual urban trends of racial integration, and continues to used canned character stereotypes, many of which involve race. Asian kids in TV shows and movie are typically nerdy, computer-savvy, or drive racing cars. This is in an era where Asian athletes compete nationally in the NBA, NFL, and MLB. Why should all asians still be nerdy on the big screen?
Hollywood is still queazy about showing interracial sexuality. There was a recent debate over Will Smith's latest movie, Hancock. I don't want to spoil it, so I'll leave a little gap. If you don't want the movie ruined, skip to the "Spoiler End" section.
***SPOILER***
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In Hancock, Will Smith discovers he is a godlike immortal being, and that the only remaining person of his kind besides him is Charlize Theron's character. That explains the chemistry intentionally placed throughout the beginning of the film between the two (and wonderfully acted, Smith and Theron go well together). There's a scene where the two actually make out, before Theron throws Smith through a building.
That scene was edited out of the theater release film because of concerns over upsetting movie-goers. Instead, they have Theron throw him out before they liplock (this is the 21st century, who hasn't seen an interracial couple?) It's even referred to in the script, which wasn't edited, so later in the movie, Smith is referring to a kiss that has never happened.
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***SPOILER END****
So, to answer your question, there aren't any black guys on the PUA for a reason you alluded to: ratings/focus groups/whatever else studios use to rate things don't seem too keen to the nerdy, Urkel black guy. That ship sailed. Blacks guys on reality shows have to start fights with other members of the house, esp. girls (there's an entire theory by a Princeton professor over why that is, but that's beyond the scope of this post), have to get kicked out due to bad behavior, have to be thug, and have to behave like loose cannons. Could you imagine a thug guy with no game on the PUA? Realistic as that would be, it would be a clusterfvck for the network, given its other characterizations of black males.
I'm sure this thread will turn into a flame war, but I invite people to challenge or agree with my views with reason instead of passion.
That means no "you just use your race as an excuse for why you can't get a job/girlfriend", and no "get over it". I'm not talking about actual reality, I'm talking about media representation.
Edit: Just to address some stuff mentioned above, my university is only 8 or 9% black, so there's not a lot of hot black girls around. I feel like routines don't work as well, but the general DJ mindset is definitely universal.
Also consider that African-Americans only a segment of the overall black population, most black girls I've known (esp. in high school) were actually Nigerian. Routines, c&f, seems to work on them better, less so on African-Americans. There's also many black people who are "Americanized". I don't want to use the term white-washed, because that suggests that the person is a race-traitor or something. In that case, just as with Asian girls who have lived in the US all their lives, this stuff works.