you just have to ask... Masons aren't really allowed to recruit new members, it's supposed to be your idea to join.
if you don't know any Masons other than your GrandFather, then goto your local Lodge and ask for a Masonic Information Booklet and if it appeals to you, ask for an application to join.
P.S. there is no bar in any of the Lodges though you can drink there.
Why would you add that? ;-)