Concentration is critical to putting, and players should respect each other's time for mental preparation. You'll also keep the game moving along if you keep the commentary to a minimum. Many golfers miss putts because they lift their heads too early. Proper attire is required on most golf courses. Wear collared golf shirts and Bermuda shorts of standard length for summer dress.
Socks are optional on most courses.
If you cannot keep it, be sure to call the course in advance to cancel. This is especially important if you've held the time with a credit card and will be charged even if you don't show up.