In order to install this room:

1- download the room and the required CC
2- unzip files
3- copy room files and paste them into your Tray catalog ([...]My Documents/Electronic Arts/The Sims 4/Tray)
4- put CC in the Mods folder

If you can't see the room in your library, please check the advanced options, and active "Include custom content".
Installed packs on my computer :

E/P
Get To Work
Get Together
City Living
Cats and Dogs
Seasons
Get Famous
Island Living
Discover University
Eco Lifestyle
Snowy Escape
Cottage Living
Highschool Years

G/P
Outdoor Retreat
Spa Day
Dine Out
Vampires
Parenthood
Jungle Adventure
StrangerVille
Realm of Magic
Star Wars: Journey to Batuu
Dream Home Decorator
My Wedding Stories
Werewolves

S/P
Luxury Party
Perfect Patio
Cool Kitchen
Movie Hangout
Romantic Garden
Spooky
Kids Room
Backyard
Vintage Glamour
Bowling Night
Fitness
Toddlers
Laundry Day
Moschino
Tiny Living
Nifty Knitting
Paranormal

Kits:

Bust the Dust Kit
Country Kitchen Kit
Courtyard Oasis Kit
Blooming Rooms Kit
Little Campers
Pastel Pop Kit
Everyday Clutter kit


Free:
Holiday Celebration Stuff
Desert Luxe Kit

Credits: Many thanks to all TSR artists whose splendid creations I used in this room.