How to sign Join a Club: BSL Sign of the Day 115 Learn how to sign Join a Club in BSL. There's a few variations of the sign for club; the first involves a smooth and quick transition from the letters C, L and B. The other variation is simply the letter C but that's usually used in a sentence where you have context so it's clear what the C means. The two signs we've demonstrated for 'join' have slightly different meanings but in this context, either can be used. The first is to 'get involved' and