Call me a cranky git you may, but, having been involved in some way within the catering trade either delivering or selling to all manner of outlets: The only takeaway I'll go for is Fish 'n chips. (mainly because of the temp the food gets cooked at)
The conditions I have seen in some establishments entering via the tradesman's entrance, are outrageous. Disgusting. The opening of some chiller doors tells a shocking story.
Not just the shanty/shyty takeaways by any means either!
Same as when going to an unknown restaraunt, I always make a visit to the toilets prior to taking a table. That gives a major hint to the kitchen condition & general cleaning regime of the establishment.