A lot of people don't know what they want ("anyone up to meet for RP?"). You can make them an offer ("sure, were?" "I dunno") but unless it's very specific they won't know either. Sometimes they'll ask for RP, you will make yourself available, and they will change their minds.
But as for bar-and-relationship RP, I don't think it's what people don't want, it's just the obvious thing you can do when nothing else is happening. No spirits around? No Blood? No politics, Wounds, strange artifacts needing figuring out? Okay, let's find a date.
Personally, the idea of meeting up at a place and RPing about nothing is roughly as desirable as logging out - the only qualifier is that maybe I'll run into someone good this time around, instead of struggling to figure out any hooks at all to squeeze something out of the scene than generic poses.
I'm getting tiresome at this point, I know, but the best way to engage people is to throw something on +events and go from there.