Stayed there as well.
Report from my stay in the experience thread is
here.
There is a small gym on the top floor along with a sauna:
Fitness Centre / Crowne Plaza Nice Arenas
Fitness Centre / Crowne Plaza Nice Arenas
Also possible to run from the hotel to the beach ... you do not really need a gym

.
Breakfast is down in restaurant "
Balm" -
Breakfast in restaurant / Crowne Plaza Nice Arenas
Breakfast in restaurant / Crowne Plaza Nice Arenas
Breakfast in restaurant / Crowne Plaza Nice Arenas
The menu for lunch and dinner is available
here.
Lounge offerings on first evning of my two day stay
Club Lounge / Crowne Plaza Nice Arenas
Club Lounge / Crowne Plaza Nice Arenas
... and those of the second evening (water was not available)
The lounge is nice in regard to design though
Club Lounge / Crowne Plaza Nice Arenas
Club Lounge / Crowne Plaza Nice Arenas
Hotel is easy to reach from the airport, you can walk. It is 100 metre to Terminal 1. Also good connection to public transportation by tram (line #2 to Nice downtown) or train.