If you live or work in Emeryville, here is a friendly pilates studio run by a husband and wife couple. The instructors are certified in Power Pilates. They offer group mat classes with a maximum class size of 10 people, which is great. Never done pilates before? I recommend taking the 4-session beginners workshop (1 hour per week for 4 weeks) for $55. The instructor is very good at breaking down each exercise and giving you personal attention to make sure you learn the basics accurately. Private training sessions on the equipment are also available. Free parking. $15 per class, but you can get a volume discount if you prepay for a multi-class card.