What to wear:
Comfy Flats: you will be walking a lot. Your feet will thank you for wearing comfortable shoes. Mine are Tieks. They aren't inexpensive, but I've had them for 5 years.
Dressy Jeans: I think you wear jeans to work as long as the rest of you looks polished. Dry your hair, add jewelry & make up. Mine are Frame.
Bright Tunic or Blouse: get in the spirit of Florida. No need to wear all black. Mine was a gift from my mom-we bought matching ones a few years ago at C. Wonder (no longer in business). The long sleeves will help with the freezing air conditioned conference rooms.
Some shopping ideas for you below.
tieks pewter flats $195