Salads are usually a good choice if you avoid the ones that have pasta in them.
Artichoke dip with vegiies is also a good choice but watch the dip as it is rather high in fat.
A couple of helpful tips for restaurant salads and other meals:

Ask for the dressing on the side; and a low fat/calorie variety if they have it
Dip the fork in the dressing and then into the salad, rather than dumping the dressing onto the salad (you'll consume far less dressing this way and still get the taste of the dressing.
Also ask for a couple of lemon wedges to squeeze over the salad for extra flavor.

Ask that they hold the bread and croutons; but if that or anything else shows up that is not on your diet plan, set it to the side of your plate before you take your first bite and salt it heavily so that you will not eat it in a weak moment.

Portion the meal before you begin to eat, so that it is in aligment with what you feel is a reasonable amount (generally what will fit into the space of your two cupped hands for a salad, or in one hand for a main course; and heavily salt the rest so you won't eat it.

Drink a cup of unsweetened green or herb tea before your meal as a beverage (it cuts the appetite and fills the tumy a bit).

Eat the protein portion first if you are having a main course or a salad that is served with chicken, shrimp, beef etc; as this will make you feel satisfied sooner. Portion the protein item off and heavily salt the amount that is excess of 4-6 oz (about the size of a deck of cards); so you won't eat it.

When you are satisfied, even if you have not eaten everything edible on your plate, sprinkle some salt on what is left and pop a strong mint or a cough drop into your mouth straight away (bring some with you). Halls sugarless cough drops are great for this.

Order some herb tea for the close of the meal to sip on after the mint.

Enjoy visiting with your friends!

With love, Erika