How much do you spend on lunch for normal work day?

Understand that it varies for everyone and depending on where you work. But just curious generally how much do people spend on lunch on normal work day (esp in CBD). I used to work in non CBD area for almost 10 years and can easily have decent meal below 5 dollars, maybe with drink at most 7-8 dollars (we do spend more if there is occassion but not often + mostly bosses will pay for it). Recently moved to company in CBD, and noticed that the people here spend like 15-20 ish bucks for meal almost daily. There are not a lot of alternative for cheap meal but I am still trying to keep my lunch at 5-10 dollars. So end up always try to avoid team lunch. Not sure if I am the one being stingy, but I can’t get the idea of spending so much for a quick weekday lunch with colleagues. Wouldn’t mind spending 3-4 times that budget for proper meal with my partners and friends definitely. So just curious am i the abnormal one, should i adjust my budget so I can socialize more? I meant idm scrolling phone, reading reddit during lunch (honestly i feel more rested this way than trying to socialize with people i am not close with tho they are nice people generally), but just worry that i would be deem as antisocial and affect my career progression overall.