Is UNH or USF better for city life?

USF is the much stronger choice for city life. Its campus is in San Francisco, with neighborhoods, restaurants, coffee shops, concerts, museums, and internships built into daily student life, and students can use public transit to reach different parts of the city pretty easily. If you want an active urban environment during the week, USF will feel far more aligned with that than UNH.

UNH is in Durham, which is a classic college town rather than a city. There are local spots around campus and the town has some student energy, but it does not offer the same level of off-campus activity, density, or day-to-day access to major city events and employers. You can get to Portsmouth or Boston for more to do, but those are trips, not your immediate environment.

USF tends to fit students who want the city woven into their college experience, not saved for weekends. It is the kind of place where internships, food, arts, and neighborhood exploration can be part of a normal Tuesday. That also means dealing with city realities like higher costs, more noise, and a less traditional enclosed-campus feel.

UNH makes more sense for someone who wants a residential campus with a quieter setting and a tighter separation between school life and city life. You can still find things to do, but the energy comes more from campus and the college town itself than from a large urban scene surrounding you.

For the specific experience you described, restaurants, events, internships, and an active urban feel, USF is the clearer match.