EMILY: I don’t know why I let you take me to this chophouse in the first place. I don’t go to chophouses.
Chophouse is a word for an inexpensive steakhouse, now so dated that it is considered a historical term more than anything else, although it’s been chosen as part of the name for several grills and steakhouses. The word has been used since at least the 18th century. There is an implication that a “chophouse” is of lower quality, but Emily thought her steak was the best she’d ever had, and the restaurant Lorelai chose doesn’t look super cheap.