This place costs more than I thought it would. I'm thinking of leaving the restaurant without paying for the meal.
That's a terrible thing to do. Don't you think the owner of the restaurant needs the money?
Well, I don't have money and I won't be able to talk my way out of it so this is the only option.
If you go to a restaurant, it's expected that you will pay for your meal. If you can't afford to pay for the meal, then you shouldn't go to the restaurant in the first place. Without payment, the restaurant won't be able to stay in business and the employees will be out of a job.
Everyone does it.
That's no excuse for you to do it too. If you do this be prepared to go to jail for theft. You're fines and court costs will be much more than the bill for the food.