You can ask for rooms with 2 double beds. That means that there will be 3 beds total with the sleeper sofa in the living room. So it depends on how friendly the 5 adults are
We were 2 adults and 3 teenagers (18, 16 & 15) and we all fitted nicely in the room. Two large beds and sofa bed for two.
It would if you book a room with 2 beds. The couch is a sofa sleeper. I would contact the hotel directly to confirm it.
Our room had 2 queen beds and a sofa sleeper. It would comfortably sleep 5. You should contact the hotel to be sure you get the type of room you need.
Get an answer from Embassy Suites by Hilton Las Vegas staff and past guests.