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Stay in Lyon if you are going to the ice halls. Décines-Charpieu (hockey arena), the Halle Tony Garnier, and Eurexpo at Chassieu are in the metropolitan area, not in the same street. Check TCL, the city transport network, for the route to the hall you hold a ticket for, once tickets exist.
The athlete village at Oullins-Pierre-Bénite is not a hotel. Do not write to the organising committee asking to book it.
Lyon is also the wrong base for a ski week. The Tarentaise is a real journey from here. If you want one hockey match and then a week of skiing, sleep in Savoie and treat Lyon as a day, or the other way around. Do not assume a same-evening connection.