It's a loaded question, but a good one.
I guess it all comes down to wanting to "have some fun" beforehand. I can't yell you how many times I've sat in the "friend zone" or been nice-guyed. Although for a while back when I was younger, with some determination, I canned the whole "nice guy", I tried being pretty amoral, simply going after flat out hook-ups, and treating women like targets to be acquired.....and disturbingly it works.
Not that I'd want a relationship with any of these women, basically you have to discard the whole notion of a "relationship" guys who are "nice guys" are doing exactly what women "say" they want, and eventually they grow up and realize that REALLY is what they should be shooting for.
But I'd say the notion is two fold, at least a couple of the women I met wanted to make me a "fixer-upper" to "make me" a nice guy. So while because I can basically check off a whole host of "mission accomplished" from a sexual perspective, it's worth saying that it's pretty shallow....let me say that again - shallow - as in you will always have a more deep and meaningful relationship with your right/left hand - than some of these hookups, physically gratifying yes. But on the whole risky, and an indication of low-self-esteem that's taken advantage of.
So after a while I took a break - and then slowly reverted back to my "old" self. Was it worth it - hell yeah - I'd be a liar if I said differently - but when I think about it objectively, outside myself - not so much. Every now and again I'll meet an old GF , it's invariably pretty awkward - or - in one case - 10 years later - we booked a room and made an afternoon of it. But that aside, it was random and shallow.
Find a nice girl that you think is single, ask her out, and be nice, but don't be shy about asking for what you want.