It depends on your risk assessment. We cannot rely only on one type of control, i.e. Masks. Factoring in the hierarchy of controls, a combination of controls are encouraged. We all know masks are not 100% effective, thus having other controls such as occupancy limits, hygiene protocols, in combination of masks can create a bigger impact in reducing the risk of transmission. Carry out a risk assessment for this scenario, and determine what other controls are warranted, and consider what is the acceptable risk to your organization.