There's 3 great rock climbing gyms in the city. Each offers something a little different. The Cliffs is the newest, arguably the nicest, and offers the most in terms of climbing and extras (yoga, sauna, workout space) but it's definitely the most expensive. Tufas is comp style bouldering only. I think it's a fun place that sets challenging but fun climbs. Philly Rock Gym has multiple locations in and around the city. It's the cheapest and smallest but offers bouldering and roped climbing. It's also the "chillest" I'd say out of all the three. They don't have anything fancy but they still have good climbing. I'd say they also generally set the simplest routes out of the three gyms.