You don't have to be a particularly good golfer to keep pace with the group in front even if they are scratch golfers. All you have to do is play ready golf and use some common sense. Waiting on the group in front of you is going to happen. The only time I get angry is when the group in front are obviously high handy cappers but insist on spotting there balls on the green taking for ever to line up a shot and then fat it out 20 yards etc.

Like every thing else in life just using some common sense and being aware of whats happening around you can keep everyone happy.