Really? To me, it seemed like your original comment was calling other peoples' choices of what to wear "bizarre" or "weird." (I used quotes because those are the exact words you used).
We've been there twice. Once I wore a dress (honeymoon dinner, yay!) and the other time I wore nice jeans with heels and a fancier blouse. We saw a similar mix of styles each time we went. Since it's one of the convention center hotels, you're more likely to see people in business casual here than some of the other resorts.