It would be easier for me to tell you the things I don't like to do while smoking the pipe... I almost always have a pipe hanging from my mouth. The rare exceptions are when I'm preaching, or leading a Bible study, or doing something up at the church.
I tried it swimming a couple of times... Didn't work so well. Doesn't work so well riding a motorcycle either, but I gave it a shot. I find most any activity can be enhanced by smoking a pipe.