I usually wear something pretty casual like jeans and a pretty shirt if I'm going to meet for drinks on a first date. However, I find that there is a different "dress sensibility" in different cities and different areas of the country. My daughter lives in St Louis Mo and people definitely dress "up" more there when going out.
And that is certainly a wishy washy answer, huh? I'd suggest that you call a friend who lives in your town and pose the same question?
eta: Most importantly: Have fun and remember, we love the day after details
[This message edited by better4me at 9:32 AM, August 10th (Saturday)]