Looks like you omitted a couple of lines. Anyway, as for me, after reading this chorus I would say that this passage creates rather willing, joyful mood. All in all when the longtime battle has came to an end, everybody feel relieved, especially those, who gained victory. The excerpt tells us that people are going to have fun and enjoy themselves so It becomes obvious that author wanted to bring to the readers joyful mood.
The prevailing emotion or mood found in the excerpt is joyful. This is clear when we pay attention to the author's approach to the scene, apparently there has been battle and it is done now, and the speaker encourages people to forget it, perhaps because of the misery that comes with war, and instead he incites the audience to focus on singing, dancing all night long, and following Bacchus who led them to make Thebes shake, which are all signs that the author wants to evoke joyful and cheery feelings.
