To choose a gym in Olympic Village, decide whether you want equipment access or coaching and accountability. For most people who struggle to stay consistent, a coached gym with community and a walkable location wins. Try a free session first and judge the coaching, the room, and the schedule fit.
This is a direct answer from the CrossFit BC coaching team. Short version first, then the detail and the local context for training in Vancouver. If you want the same answer applied to your own situation, a coach will walk through it with you in person.