Outlook 2011 (for MAC) – is there a Calendar Groups equivelant?

In our organisation, we are mainly PC users, with 3 or 4 MAC users in the mix.  We have 30-40 rooms which each have their own calendar (and own outlook account) and the PC users are able to organise them into Calendar Groups according to their requirements (eg., group rooms with VC functionality together, or group the rooms on the first floor together, etc).  I cannot find a way to do this with our MAC users.  I know they can do it using Office 365 but wanted to know if there is a similar functionality for Outlook 2011?

Thanks