Yeah, the short answer to this question is: "Why aren't
you?"
There are a hundred other longer answers: "A gentleman always wears a tie," "'Cause I'm a classy motherfucker" (the point of that, of course, being in the humor of the subversion and the shock of hearing it out of a guy in a tie), "'I beat up some rich guy in the alley out back," some long colorful story about winning it off someone in a poker game, blah blah blah...
Not damn thing wrong with what you're doin, nope. I myself often hit the town rockin Expresswear and a badass tie. I clean up very well.
Never fails to get noticed.
Wrote some thoughts
here a while back on peacocking via formal dress. I think overall it makes a lot more sense and (my theory goes, anyway) is more effective (at least for people newer to PUA) at grabbing positive attention right off the bat.