Being more mature does not mean that you do less. Ideally, it means that you have more knowledge to share, more time to enjoy life, and more time to study and know God. Like every other age, it is a time of change. As one of our seniors so clearly states "growing older is NOT for wimps".
Our seniors are active in Bible Study (normally Tuesday afternoons), mentoring younger members, encouraging and supporting each other, and in general 'being available'. Their service is wide-ranging. They serve as encouragers of others, as great listeners, and participants in nearly every church activity that occurs (even some softball games).