I think most people miss the point of dating. They act as if asking a girl out is the same as making her your girlfriend, or blah blah blah reverse genders for our female readers.
Also, where do you all live that all the bars are dark seedy places?
In my town we have a bar for the slimy hookups, a bar for the gay/party boy demographic, one for the indie bands, one for quiet drinks. Come to think of it, my town has a whole bunch of different bars. That might explain why everyone is always so drunk... anyways
I see an attractive girl, so I ask her out. We go out on a first date at which point I get to know her to some degree. Usually by the end of the second date, I can tell if we are compatible. If we aren't, then no third date. Simple as that.
Also, this is all a good argument for casual dating. So feel free to ask a couple girls/guys out, get to know them, then make your choice. Feels more sciency this way.