How does Classpass change page titles in SERPs based off of the user's location?

Hey all.

I'm wondering if anybody has insight on how Classpass offers seemingly dynamic page titles based on the user's location.

For example: on this page, the page title in your browser will reflect your current location. https://classpass.com/search

Same in search engines - when you google "Classpass map", it will offer a title in the SERP that reflects your current location.

TIA