Through a conference for work, I used a free pass to go to the gym on the weekend. Capital Fitness is located in an older building, but the inside is renovated and it looks really nice. It's not super luxurious, but it's modern, clean, and urban. There are several different levels with different features -- there's a spa, a level for classes, and then the usual gym machines.
I went here for a zumba class with a really fun teacher who was really sweet! The class was small - only about 10 people, but we had a ton of fun.
Everyone was very helpful and friendly - definitely recommend this gym!