No, really, it's true. Walk into an interview, and see what the prospective boss has growing in her or his window. If there's an orchid or two, mention casually that you grow orchids. If you're feeling really gutsy, you could bust out with something like, "Wow, what a great multi-floral phalaenopsis hybrid you've got there!" You may get asked a cultural question, or launch a whole discussion about how each of you got into the hobby, or favorite species, or where to buy good plants. It could be that extra connection that clinches the position for you. Hey, you never know.
Or it could be like my interview today, when I noticed a well grown ludisia discolor on the windowsill, and upon mentioning it to my interviewer, was told that the plants were the territory of his executive assistant and he was "not allowed to touch anything."
I'll let you know whether I get the job or not.