Nervous About Dinner With Ceo, Coo And Other Employer Dignitaries?

I have been selected to attend process improvement classes with for the next year at my job. I was hand picked by the VP of HR which I am on a couple committees with. After the first night of class, there will be a dinner. At a restaurant. I am nervous about going. Beside being in these classes with managers, and directors, the CEO and corporate officials will be there. I truly feel like I am not ready for the dinner. I have enough to deal with going to class with the managers and directors, but to sit there socially with the group. A couple of people I asked that are in the classes stated that they were not going to be able to attend. I told a couople of people I have an appointment that evening but I may be able to rearrange the time. The dinner is right after a day long class. 8:a.m. to 4:30 p.m. I really feel like passing this up.