There are other schools that have Harkness, but most BS have highly engaged students and very participatory classrooms, so you can find that in LOTS of places. Some schools take experiential learning further than the table- as in classes with travel or with a maker space.
Most schools have clubs and volunteer opportunities to bring interests to life. Because PEA will not be a sure thing, you can ask folks here to help you build out your list. It’s more work to apply to more schools, but done strategically, it also greatly increases the odds that you’ll be at a school where you’re happy next fall.