I actually agree with some of Whitewolf's points here...
I think it was careless to cancel the date at the last minute... she did change the location - which I wouldn't like - but that is not the same thing as a last minute cancellation... It makes it appear like you are saying "if we can't START the date at your apartment, I'm not interested." As you have never met in person before, it is reasonable that she wants to meet in public first - how does she know you look like the guy in the picture..? If you meet in a restaurant, you can always transition to her apartment later as things get more intense...
I disagree with Whitewolf's assertion that "first dates" must always be in a public place... It makes sense from a female's perspective, but if she wants to invite you over so she can cook you dinner - go for it.
I think it is a strategic mistake to insist right off the bat that you are only interested in "fun and pleasure." It is almost never 100% true, even among sexually-desirable men, and women are often aware of this fact... Imagine you ran into Robbie Margot or some millionaire swimsuit model at a conference... would you really insist that a relationship was out of the question, and you could only be down for "fun and pleasure" ..? That is hard to imagine... It is more likely that you (and most men) would play it by ear and see how things develop rather than setting firm boundaries... this is the way all of my relationships developed, and I think this is close to the norm. If you start by ruling out the possibility of a relationship, the girl can tell that something is "off" ... It gives the impression that you have given up on connecting with the most desirable partners and you are trawling for scraps... If you are unusually handsome you may still get responses, but I think they will be fewer in number and from less - attractive women... As a matter of strategy, I think it us better to leave the "relationship desired" section vague and open to possibilities, so the girl has something to wonder about and something to hope for...
I think many guys are taking this PUA "act like an asshole" idea too seriously... It is true that some sexually-successful guys act like assholes - but they don't do it all the time... Why would you imply to her that she is a cock-riding slut before you have even met..? You can get away with seeming self-centered, but you don't want to come across as mean-spirited or angry around women, because it reeks of failure and sexual frustration to girls who would otherwise tolerate self-centered behavior.
Even self-centered asshole guys are a bit more diplomatic BEFORE having sex with the girl... After the relationship turns sexual more of the asshole behavior comes out because there is a much higher level of intimacy...
I hope the second prospect works out better..!