There are a number of area's of the Forum that are now either "opt in" (you choose to be in them or not) or "request" (sends a message for approval), they are:
Opt-InBikers Corner
RC Area
Jokes
Photography
RequestedMKB Ladies
Naughty Zone
MKB Members
To add the additional areas, it's the same for both:
- Click on "Profile" in the top menu
- Under Modify Profile, select and click on "Group membership"
- At the bottom of the page, you can see the available groups, simply click on either "Join Group" or "Request membership" to the right of the appropriate group
- If the group is "Opt In", you will instantly see the additional area's on the main forum home screen, if it's a "Request" style, once it's approved it'll appear on your home page.