What do you wear to an orentation?

I have got a job at mcdonalds, its a temperay job so that i cna save up money for my car and since i have planty of time off now that i've left school. I have my orentation today and im not sure what to wear because we havent recived our uniform yet but im sure that will be covered during the orentation. Any ideas on what sort of clothing you think would be suitable to wear would be helpful please ?