Rogue nation: about cab drivers
Sorry for offtopic, but I just have to say this: years ago I had an American customer bragging: you know: we in New York, we don't have American cab-drivers anymore, they are all from Pakistan, India, turkey, Kazakhstan, and so on. So I said guess what: We here in K'town have three major Mexican restaurant, maybe 100 sq-meters each, and none of the owners, or waitresses or cooks are from Mexico. They are all from Pakistan, India, or Bangladesh.
So now you know why Americans mistrusts so much the cab-drivers. Because they have never seen one with a professional ethic.
And by the way: you don't seem to have an idea of Frankfurt-nighttime-taxi-mathematics: if you can calculate, if every second ride goes to FKK (like a lot of nights) it's much smarter to take the customers to palace with the shortest distance, or mainhattan with the second shortest, but highest commission of all Frankfurt-FKKs. But since Mainhattan has no advantages from my point of view compared to Oase (that means just as bad), there is only sharks remaining, as the only reachable alternate. Palace of course for experienced guys, that know how to get rid of the upsell-queens. FKK-world: far from good enough for the costs. And by the way: how many visits in Oase you have?