Oh I see, I read too fast I guess.
I said white for the example of course...
In my opinion going to a club with less gaijin gives you the advantage of uniqueness, and can get more people interested in talking with you, women or men. It could lead to nice conversation and future romance or friendship (I would say that is rare) or more annoying conversation full of stereotypes about gaijin and stereotyped questions. The annoyingness level may vary depending how many times you've heard the same questions over again and how nice of a person you are.
Personnaly I can't take any "nihongo jozu" after saying as meaningful word as arigato, but that's me. Some of my friends are much cooler and don't mind talking about same superficial topics every weekend.
You bring up a very good point. I've heard this argument many times, where there being few other foreigners, appears to make you more interesting to Japanese.
Hmmm... That's a difficult one to reply to, because at times it can apper to be true. But for reasons different than many think.
1) Japanese interested in foreigners have less choice in X location, so choose the only one there.
To an extent this is true, but only to how arguably lazy or socially limited the Japanese person is. A Japanese person interested in foreigners can travel overseas, use online hookup for the city they are in, or make it a point to jump to different clubs where there are more foreign men.
In other words, because you are the only foreigner there at that time, doesn't mean they have to talk to you or they don't have other options.
2) Bias against supposedly or rumors of rowdy foreigners that tore up a place or were a nuisance.
Here, bias behavior against foreigners is somehow justified based on the experience, media report, or even gossip/rumor that some foreigners did something bad. Therefore Japanese "need" to be on high alert against all foreigners or those in their area. Often stoking irrational fears and excessive paranoia.
In Japan, when a particular group or an individual foreigner does something bad, it seems condemnation or fear can spread throughout the location. Even online or through the media.
So, if a group of Turkish guys get too aggressive in a HUB, for example, it seems many Japanese women can be afraid of all foreigners in that place. Even those that never seen anything, just heard about it or read online gossip.
Say a British guy, who had nothing to do with what some Turkish guy did last week approaches a particular Japanese woman at the same HUB. She starts waiving her hand in the "no" motion and calling him "charai" to her girlfriend.
That British guy may think that because too many foreigners come to that place, then this is the problem. It caused the Japanese women to be afraid, so he must find some magical place where no other foreigners go. Sounds too good to be true? Because it often is. It's not just about the place or number of foreigners.
But when an unwarranted negative reaction by a bias Japanese person is given, often there is little a foreigner can do. You can't stop, beforehand, a preconceived notion or stereotype that a Japanese person, club manager, or even an apartment owner may have.
I've found that more intelligent or more traveled and international minded Japanese will give you the benefit of the doubt before dismissing or discriminating against you. Where those that are close-minded or excessively paranoid, won't. So, how many other foreigners are in the place usually doesn't matter.