Yes I agree. I bought a 10 x 10 canopy with removable sides off ebay for $99. I almost did not set it up at the first event then I decided to. Once I set it up It was full of people eating under it all day. The older folks and the people with young kids really found it useful.
This serves as a marketing tool. When passer-bys observe others enjoying your food, it becomes an enticement.