Is it chian steakhouse? Do they have an online menu? If so look at the menu before you get there already decide what you are going to eat. When you get there do not look at the menu stick to your plan of action.
For steak it will not break you calorically make sure you request no butter on it when they cook it, and also ask for light seasoning. Stick to a light salad dressing if you choose the salad, and avoid the free bread as it is empty calories. Also chicken dishes are a good choice just make sure you ask how it is prepared. Most places add butter to everything it is why food tastes so good when you go out to eat. Just be aware also that if you order the vegetables as a side they will also be doused with butter. Just a word of advice when you ask for these things be pleasant about it, make sure to say please and thank you, I know most servers will "forget" to put in notes about what you want if you make a big show about how you "HAVE" to have this and that. I am not saying you will do that but having worked in kitchen for years being pleasant and friendly goes a very long way especially if you have some changes you need to make to how food is prepared. Sorry if this is rambling on I have not woken up yet even though I am at work lol.

How did it go?

That is incredibly, great job! That'll encourage you for next time too!

Good job. Great willpower.