A hostel only accepts male guests. It is not unlawful for it to refuse to accept female guests because the majority of the bedrooms are shared and there is only one communal bathroom.
At a worksite the only available sleeping accommodation is communal accommodation occupied by men. A woman employee who wishes to attend a training course at the worksite is refused permission because of the men-only accommodation. Her employer must make alternative arrangements to compensate her where reasonable, for example by arranging alternative accommodation or an alternative course.