Nightmare pubs may only work in the presence of a living barkeep.
The file /std/barkeep.c has been created for you to inherit a monster
that has all of the pub functions built inside it.
To build a pub, you need only build a room that has a menu of the drinks
you want to serve.  An example of how to do that is /d/standard/pub.c
It is almost exactly like a regular room except that it clones a 
barkeep and has a function for reading the menu.
The barkeep is in /obj/mon/lars.c
This is what you have to do for your pub:

inherit "std/barkeep";   // this inherits /std/monster

You set the regular functions you need to set for building a monster, plus

set_menu( ({ "firebreather" }), ({ "alcoholic" }), ({ 25 }) );
	This function sets the minimum information a pub needs to get
	itself working properly.  The first argument is an array of
	names of pub/restaurant items, the second is an array of what type
	of items they are (food, soft drink, alcohlic).  The third is
	their strength, or healing power.  An example of a function that
	gives a pub more than one drink is:
set_menu(
	({ "firebreather", "special", "ale" }),
	({ "alcoholic", "alcoholic", "alcoholic" }),
	({ 25, 15, 3 })
);
	This makes the pub sell a drink called a firebreather with a strength
	of 25, a special, also an alco drink, with a strength of 15, and
	an ale, an alco drink with a strength of 3

set_currency("gold"); // This sets the currency for your pub

No other functions are NECESSARY, but they should be
used.

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set_my_mess(
    ({
    "You drink a firebreather.\n",
    "You drink a special of the house.\n",
    "You drink some ale.\n"
    })
);
	This function gives a message to the drinker different than the
	standard message.  If you give a message for one drink or food,
	you have to give a message for all of them.  They must match up with
  	the order you put them in set_menu()

set_your_mess(
    ({
    "drinks a firebreather.\n",
    "drinks a special of the house.\n",
    "drinks some ale.\n",
    })
);
	This function sets the messages given to observers of the player
	who drinks or eats the item in question

set_menu_short( ({ "A firebreather", "A special of the house", "An ale" }) );
	This function sets a more interesting short description for the
	item in question that the capitalized version of its name.

set_menu_long(
	({
	"A firebreather from Lars Pub.\n",
	"A special of the house from Lars Pub.\n",
	"A nice pitcher of ale.\n"
	})
);
	This function sets the long description for the drinks.

set_empty_container(
    ({
    "shot glass",
    "shot glass",
    "pitcher"
    })
);
	This function gives a name for the empty containers of drinks.
	If you have food and drink, make sure you put a 0 where the food
	objects are.