Visiting - what to do and gym recommendations please!

Hey! I'll be visiting WPB for a week in August. I'm from overseas and here for work mainly.

Looking for some suggestions on: 1. what to do and see when I have down time through the day and evening. 2. Gyms that are inexpensive /offer free trials and easy to get to.

I'm staying near Captain Willies Charters, which may or may not be a famed WPB landmark haha

Thanks!