I see two possible optimizations for the 10kbclub.com index page. First, you could rely on Brotli for compression (gain of ~1300 bytes on the current page) as you seem to rely on a Chrome headless which I assume would have br in its Accept-Encoding. Second, you could try removing a few response headers which take a full 664 bytes.

Solution: don't display all entries, club rules, and membership info on the same page.