I think I know what the user means. Trust me (yeah sure random internet person), you have no idea how often the most innocuous stuff gets used as an opening, a justification to keep bothering someone. Some guy asks for the time? Suddenly he also wants to know your name and do you want to have a drink? Some guy asks where x building is? Oh well, have you lived here long? I'm new here, maybe we could get together? Or it's "does this tram go to x station?" and then, fuck, you're stuck in a moving tram without an easy escape and the guy keeps asking why he can't have your phone number, even though you already said no and then you lied about having a boyfriend, but still he won't give up. Playing along with someone, being nice, trying to help them with innocuous stuff, 8 out of 10 times it doesn't end there at all.

Before I get a bunch of downvotes: No, it's not every guy. We know it's not every guy. But most of us don't want to sit through 6 creeps just on the off-chance of meeting a nice person. It's just not worth it. And yes, it's always guys who do this. I've never had a woman following me after giving her directions. I've never had a woman keep pushing me after I said no (and I'm sure they exist, crappy women exist, but usually I feel perfectly safe responding to women - so sue me, confirmation bias).

Edit: Just to respond to your specific situation. I think I might have given you the high five if you'd been at it for a little bit and I'd seen you do it to everyone else and not acting like a creep. The fact that it's a bar scene and a social environment makes it all a little easier, imo. Most of my examples, real experiences btw, always happen in non-social scenes, like when going to work, or while doing groceries, etc. So in your case, I probably would have. But just to point out: it wasn't about you personally, basically a bunch of creeps ruined it for you.