Is there a gym near Main Street in Vancouver?

Yes. The Main Street corridor from Terminal Avenue up to Broadway has coached functional gyms, studios and access gyms, with the densest cluster just west of Main in Olympic Village. Almost every address on the corridor is within a fifteen-minute walk of at least one coached gym.

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.