You'll also want people to RSVP so you have a head count for the caterer. If, on the other hand, your rehearsal dinner will be fairly low-key or small (think: a party at a restaurant or an intimate gathering at your future in-laws' home) then you don't need to be as official with your invitations.
The exact nutritional value of an orange depends on its variety. According to the U.S. Department of Agriculture, a standard-sized navel orange contains 69 calories, 17.6 grams of carbohydrates and 11.9 grams of sugar.
Calories in an Orange. Raw oranges have fewer calories than orange juice does. A medium orange contains about 60 calories, while a cup of raw orange juice has 112 calories. To cut calories, you can dilute orange juice with water. However, the best way is to substitute orange juice for oranges.