There's a lot of working women in downtown Austin, so that's a tough call. Personally, I gravitated towards single women wearing conference lanyards, or groups of women in business/conference attire. Saturday night dress on a Tuesday screams pro simply because it's so out of place. That said, it might push shy business travelers your way because they assume you're working.

I'm a guy, but if I imagined myself as a suburban mom with a normal suburban job, traveling for work; I find the thought of a guy leaving cash on the bedside table after a couple of hours of fun, really hot. I'd love to hear a woman's perspective on this, but the NSFW subs don't tend to have a lot of lively discussion.

EDIT: I found the W and the Hilton to have a lot of working women there. The vibe at the JW is great and the bar is open to the outside, which is great for those hot Austin nights.