I consider 'have' as a stative verb, unless it has the meaning of 'eating.' In some cases I found it different but I couldn't describe it, like:
1. We're having a great time here.
2. We're having a party tomorrow.
Isn't it considered as a stative verb here?
To be honest, the concept of a stative verb is new to me, but I think neither of your examples is stative. The first is a present continuous tense. The great time is ongoing. It is continuing to happen in the present. The second is a statement about the future: we will have a party tomorrow. A stative verb might be anticipate: we anticipate that we will have a party tomorrow. Your state is anticipative.