Depends why you want to join and what you think the benefit will be to you.

My ex was invited to join - to my knowledge Freemasons do not, in general, advertise their membership so it could be difficult to ask to join, at least in the UK.

It basically just seems to be another club, but with more secrecy than normal. They do do charitable works - we asked them to supply a computer to a family with a chronically sick child and they were able to do that.