Moony
Самое верное - спросить у работников аэропорта
именно так и написано у них на сайте:
"Retiring Rooms
Retiring Rooms - Availability
Rooms Beds
Terminal - IB (Domestic) 9* 22
Facility is not Available
*Seven rooms are two bedded and 2 rooms are provided with 4 beds.
Dormitory No. of Beds
Terminal - IB 08
Terminal - II(in car parking) 62 (Airconditioned-11)
Charges
Particulars Amount in Rs. per 24 hrs. or part
Single Bed (A.C) Rs. 450/-
Double Bed (A.C.) Rs. 650/- *
Dormitory S/Bed (A/C) Rs. 250/-
Dormitory S/Bed (Non-A/C) Rs. 90/
* Rate valid for family only
Procedure to avail the facility
Contact Airport Manager of respective terminal for allotment (round the clock).
Transit passenger with confirmed Airline ticket for onward journey within 24 hour are allotted one bed per person in retiring rooms and dormitory.
Not more than two passengers are allowed in two-bedded room.
If a passenger has been allotted bed in room with more than one bed, it will be subject to other passengers joining him at any time for which he can have no objection.
Children below 12 year can stay with the occupant without extra charges.
Beds are allotted subject to availability on first come first served basis and no prior booking is accepted
"
http://www.airportsindia.org.in/igi/passenger_facilities.jsp#1но там кто первый пришел, того и место.