I agree with the previous commenters to get your BF% checked. If the goal is fat loss, it's best to actually measure fat loss and not weight loss.

The gym should have a hand held body-fat monitor laying around. If they want to charge you for the test, walk away. You can buy your own Omron Fat Loss Monitor for $20-$25 on ebay.

As well, the suggestion of HIIT training is a great idea.

Cardio is best at improving your aerobic system, not melting fat

HIIT training is best at developing your anaerobic energy system and is better than cardio in melting fat

Resistance training is best at toning various properties of muscular performance - strength, power, endurance,etc.. It can be effective for weight loss if performed in a circuit training method

And finally, diet is still going to be your most effective tool. It's much easier to eat 500 calories than to exercise away 500 calories. Sad but true

Hope this helps

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