Most effective way to tone up. Classes or gym?

[losenotloose]

I've been going to spin and body pump classes since the end of October. I prefer classes because someone else is motivating me to keep going! However, just going to the gym would be more convenient time wise and I'm wondering if it's the best way to get results.

What do you think?
Thanks

Yoga, Pilates, cardio, Zumba, Booty Barre, Flex and Tone.

Classes are much more motivation imo.

Walk and swim as much as you can. Run a bit. Do a bit of Pilates. That works for me.

How often do I need to do Pilates to get a good bum? It's one of my problem areas!