Zenith 1 is just a few minutes from the center of Argentiere and a 10-15 minute walk via the cross-country ski track to les Grands Montets ski area. Not forgetting you can take advantage of the complimentary bus service available within the valley with the nearest bus stop just in the middle of the Argentiere village, only a few minutes away.
If you are looking to travel as an even larger group then ideally located is a sister chalet next door, Zenith 2. Groups of 20-25 can easily be catered for. Please ask for details.