Hi - I just wanted to jump in here... as has been said, if this is just a 'treat night' and you are not counting calories, by all means, have anything you like - Indian food is delicious!
However, you might find this info helpful (or not!): Indian dishes are mostly made with a flavourful reduced butter base called ghee - this is pretty deadly when it comes to healthy eating - it is a fat. ANY dish that is creamy (Korma, Kashmiri, Pasanda, Masala to name the most common) is not a great choice for the dieter, but good lord, they are fabulous!
The very best option for calorie-counting is a tandoori dish - these are dry cooked, VERY tasty dishes - opt for prawns (if you like seafood) or chicken - the lamb WILL be fatty.
Watch the 'extras' - it's amazing what you don't even notice - naan breads are oiled before they are baked, and any that are filled (I LOVE peshwari naan!) are virtually impossible to add up. Popadoms are fried, and the 'pickle' they are served with is often high-calorie. Even Basmati and Pilau rice are a sure add-on!
I can't live without my Indian food, but I do opt for Tandoori prawns and salad... I do miss my days of popadoms, nann bread, saag paneer and chicken Pasanda... but the meal I have just mentioned is over 5000 calories!!
Have a lovely time - and go knowing you have been warned! LOL!!
Heather