What type of managemant team does one need in an events and conference centre? By this I mean, what kind of staffing does one need?

Depends on the volume of work that's expected.

And management does not have to be a team, in some cases it is merely a structure, and does not include any "team" concepts

Thank you for your input. I still need some help though. I would like to open up a small events and conference centre which would accommodate a max of 500 guests but I don't have much experince in this field. How do I start to set up a management structure/heirachy? Should I just have supervisors in each dept? i.e.. Catering,cleaning,outdoor maintenance,etc.