M.P.
I don't understand what your question is? Are you referring to the liqueur sambuca or the club? Either one, go for it. My philosophy is do what you want on your birthday.
Ana, I didn't know this was a site that required research. Guess if we don't understand we should just not answer it? My thought is that if more info is needed it's OK to ask for it. I don't see one stupid comment to this question. I see your comment as rude. "There is never a stupid question!" Questions is how we learn.