If this is super important for your community, you might look at having a 3rd party resource created that helps create redirects for you. While you can't rewrite IPB's club URLs, you could create some sort of redirect that points to the real URL.
However you could run into scenarios where this could cause problems... a few that come to mind:
A club is renamed.
A club has a similar or same name as an existing club
A club name has special characters
So if you go this route, make sure to think through potential situations that might come up as a result of the project.
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