You book it and pay for it.

Guessing below is what you are talking about.

But this description reads a deluxe room as an oversized room. Agree with pp, when I think of what OP described I think of a suite, not a room.
From the Disney website:
Royal Palm Club Level with Concierge Service - Main Building Deluxe Room
Main Building Deluxe Room is an oversized room that offers views of the Courtyard Pool or Beach Pool
Additional adult charge of $25 per adult per night for more than 2 adults
2 queen-size beds
Private balcony
Rollaway bed available upon request
Access to Concierge service at the exclusive Royal Palm Club
Personalized Front Desk and Guest service
Pre-arrival Walt Disney World Resort Itinerary Planning
Opportunity to book the Wildlife Discovery Excursion at Disney's Animal Kingdom Park for an additional per person fee
Lounge with beverages
Continental breakfast, midday snacks, afternoon tea, evening wine, cheese and hors d'oeuvres, late night cordials and desserts
24-hour room service
Turndown service
Satellite TV (includes Disney programming)
DVD player or DVD/VCR combo player
Newspaper delivery
Table and chairs
Vanity area with two sinks
Makeup mirror
Coffeemaker
Refrigerator
Microwave (available upon request)
Wet bar
Hair dryer
Iron and ironing board
High-speed Internet access (for an additional fee)
Pack 'n Play playard (full-size crib is available upon request)
In-room wall safe
Ceiling fan
Voice mail
Phone in bath area
Robes
Laundry facilities/services
Wheelchair-accessible rooms available
Non-smoking
(The website also lists information on a Royal Palm Club Level with Concierge Service - Main Building Deluxe Room - King).