Managing your money well does not mean you can not have fun with your money. Managing your money well means making careful plans for your spending. It involves deciding ahead of time what you will use your money for and what you will not attempt spending your money on. Doing this gives you an effective hold on your finances and helps you to save money instead of spending it impulsively on things that are not your needs.
You can have fun with your money by spending it on things that you enjoy, but deciding ahead of time the exact amount you are ready to spend on those things will makes a better money manager.