Not to often do you find people who would speak the language unless you are around my circle of people. I am glad you are interested in different languages though. My Fiance is an Interpreter in Washington D.C. and knows several languages as well as is fluent in Sign Language.
I went deaf as a child [glue ear]. I can hear fine now, but when I went deaf I wanted to learn sign language. I was told it wasn’t necessary, so didn’t learn. But it is a wonderful language to be fluent in.
I did go on a deaf awareness course at work, where we were told sign language was not straightforward as there was more than one form. In practice I have found I have seldom being in a position to need it, even though working with quite a number of disabled children. It was usually the case that they had someone with them that knew them well though, even if they could not sign.