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I did not find the first version with the desk inviting in any way. The last thing I want to vision when going to an event are those old style uncomfortable desks we had to sit in back in school. Secondly, seeing the food makes me want to engage even more, it looks delicious, and I am more willing to goto an event that has that kind of food than one showing a boring, uncomfy desk...

The image is not meant to be taken literally. It's supposed to convey a school atmosphere (as in a place for learning).
Also, I think you're all getting the wrong idea of the "event", it's my fault for not explaining more thoroughly. These sushi classes are limited to only 10 people, not a huge deal. It's purpose is to build a closer relationship with their customers. The restaurant is small, only seating about 50 people, and their customer base is even smaller.