I know you are an adult now, but do you remember your childhood? Playing was the best thing that many of us were considering it as our number one thing in our lives. Playing with your friends will make you happy and will make you very active. Sometimes you can be angry to your mama when she locks you in a room because you are playing too much.
There is one thing that i noticed, playing is not only in childhood but you can play even you are a grownup. You can play with your children, you can play with your friends, you can play with your brothers or sisters, and you can play anywhere. It is good to play because makes us joyful and happy.
If you feels to play, just play because there are many ways for a grownup to play. Never feel shy because you do it for your life.