Why does the author include details about the lins night out at the Lakeview restauraut in the all American slurp

The answer is "to demonstrate that narrator's difficulty adapting to American society".

Explanation:

Lensey Namioka's "The All-American Slurp" is a story. A migrant family's uncomfortable experiences in a foreign state are recounted. As just a consequence, "Lakeview" was an expensive chain restaurant. Aside from Chinese restaurants, it was rare for all the customers to make at such establishments in America. Again for the narrator's struggles to adjust to American society, this was necessary to include the details. However, they found it hard to adapt.

to illustrate the narrator's difficulties adapting to American culture

Explanation:

"The All-American Slurp" is a story. A migrant family's uneasy stay in a foreign land is described. As a result, "Lakeview" was a costly chain restaurant. Aside from Chinese restaurants, it was rare in America for all customers to make. The narrator's struggles to adapt to American society necessitated the details. But they struggled to adapt.