How Did Gatsby Measure The Success Of His Party In Chapter 6?

The final incident of the chapter 6 of The Great Gatsby is the party at its end, the first and only party Daisy attends, and is, in many ways, unlike any party Gatsby has hosted so far. Up to this point, the purpose of the parties was twofold: to get Daisy's attention or, failing that, to make contact with someone who knows her. Now, for the first time, she's in attendance (with Tom, no less), so the party's purpose must necessarily change. Daisy and Gatsby have become increasingly comfortable with each other and even Tom is beginning to feel somewhat threatened by Daisy's "running around alone." At the party, Gatsby tries his best to impress the Buchanans by pointing out all the famous guests. Tom and Daisy, however, are remarkably unimpressed, although Tom does seem to be having a better time after he finds a woman to pursue and Daisy, not surprisingly, is drawn to the luminescent quality of the movie star (who is, in many ways, a sister to Daisy). By and large, though, Tom and especially Daisy are unimpressed by the West Eggers. The "raw vigor" of the party disgusts them, offending their "old money" sensibilities, providing another example of how the Buchanans and the people they represent discriminate on the basis of social class.
Gatsby seeks out Nick after Tom and Daisy leave the party; he is unhappy because Daisy has had such an unpleasant time. Gatsby wants things to be exactly the same as they were before he left Louisville: he wants Daisy to leave Tom so that he can be with her. Nick reminds Gatsby that he cannot re-create the past. Gatsby, distraught, protests that he can. He believes that his money can accomplish anything as far as Daisy is concerned.