I’ve been doing some research on the era, and it looks like you may need to redesign the interior and make the bar more of a focal point. Jazz/nightclubs back then were quite lavish as well.
Your current theme is very industrial, which is a much older theme that was popular in the 18th and 19th centuries.
I checked your profile out, and it looks like your older build matches the theme quite well.
I liked the wood-themed interiors in this article.