Flagship - Castro is a gym focused on functional fitness and CrossFit-style workouts. It is described as having a world-class, supportive, and incredible community that is welcoming to everyone, especially newbies. The coaches are noted as friendly, professional, passionate, attentive, and dedicated, emphasizing safe strength and conditioning while caring about form. The space itself is an open, well-maintained, and efficient layout. Reviews consistently highlight the outstanding, positive, and strong overall vibes, making it a highly recommended gym for all needs.