Your not alone mate!
I have the contract for Scotlands largest indian resturant group, 14 restuarants they have at last count and from what i hear they have streamlined the group certain areas and going national (very soon) with their fast food curry chain which is based on a small version of their normal restaurants based in shopping malls and leisure/retail parks.
And yes it goes into the small hours sometimes!! pay is good so it outweighs the bad.
Cheers
Scott