What are fun ways I can exercise to lose a lot of weight?

Dancing, zumba. Taking dancing classes or zumba classes are some of the most fun ways to lose weight and burn a lot of calories. Some people also find swimming or spin classes a lot of fun.
Anything you like. Exercise is an inefficient way to lose weight. It only accounts for 20% of the weight a person loses. You will do better if you participate in activities that are fun for you. If it is fun, you will be more likely to stay with it and not view it as a chore. When your main purpose of exercise is to lose weight, you may become disappointed and quit if you don't see quick results.