I walked in the front door and knew I was in a place I'd enjoy. I'm 6'2" tall and there was smoke hanging down from the ceilling as far as my eyes. It was surreal. Many of the tables were occupied and nobody seemed put-out by the smoke. However, they weren't standing in its midst.
This is quite like most places on Devon at certain times. If you ever venture
into one of the cabbie-joints after midnight or so (Daata Durbar across
the street from Khan's, or Hyderabad House 50 yards up the road),
those places too are about as smoky as it is possible to get. Though its
more the cigarette-smoke than anything else in those cases

Lots and lots of people came and went ordering to go and picking-up previously called-in orders. The place is primarily take-out, if what I witnessed is any barometer of what the routine is.
I think more people are beginning to take-out now, due to the size of the
place. If you ever go there on, say, Friday evening (especially over the
summer), the place is packed. A friend once went and had a half-hour
wait for a table - and there isnt any place to sit while you wait, either

Thus, takeout is seen as the best option sometimes. (OTOH, Ive
sometimes made it there at non-peak times and seen pretty much
nobody in there too).
I went to Khan following a bad meal at La Oaxaqueña the night before. Two strange meals in the same weekend. The only plausable explanation is that there was a full moon.
Beam me up . . . Scotty!
Unfortunately, one cant quite blame the Khan-experience on the full moon -
it can happen quite often
Went with a friend once, and ordered a couple of normal naans, a chicken
boti, and IIRC a mutton korma. Within a minute or two someone showed up
with an onion naan and a chicken tikka. I told them that wasnt what we
ordered, so they rapidly took it away ... and brought a normal naan and
a chicken korma

Once again I told them we had a *mutton* korma and
a chicken boti, so off they went again. This time it took a good 10-15
minutes for anything to happen, but they finally showed up with the
right order (but were short on naans - which were replinished quickly
when we pointed it out).
Service is laughably bad there, especially when things are even a little
busy. This was the first time my friend had been, and he was most
unimpressed with it, asked why it was that I had wanted to go to
this place in particular since it seemed they were so disorganized
in general. It was only after the food was tasted that he figured it
out
The answer is to be firm as to what you want, and accept no substitutes
When I want the chicken boti (which I usually do), I always send back
whatever else they send me until the chicken boti shows up. Its probably
the only way you can be assured of getting what is, probably, their
tastiest dish
c8w