At first, solo, very solo. Like I'd even avoid my wife until I felt comfortable, because at my size (was over 300lbs) certain things were embarrassingly difficult. As I lost some, and more importantly found workouts that worked for me, I started venturing out, now I do a lot of group classes (dance stuff mostly). Even though I'm still often the biggest, I feel a lot better about myself overall so I enjoy it and I've found some very supportive studios with awesome vibes.