It is kind of sad that in order for me to get to a spin class these days, I have to be in NYC. It's not that Delray doesn't have spin studios (PurCycle and Flywheel aren't too far away), it is just that their class schedules aren't really conducive to mine. It is partially my doing -- I prefer morning classes because I feel more in control about making them, but there is just no reason to go to a 5:45AM spin class when you don't need to be in an office all fancied up. At the same time, the latest evening option is at 6:30PM and THAT is only twice week.
Since I've been traveling a lot in the last three months, I've found myself at Studio 360 at least twice a week for a spin class. I love them -- it almost like they were made for fitness-obsessed travelers like me. I don't have to worry about renting or bringing shoes, I don't have to worry about a towel, and I don't have to worry about a water bottle. 
It doesn't hurt that they are around the corner from my hotel of choice and takes me 4 minutes max to walk there, so when I am going to a 6:30AM class I am not getting up at the crack of dawn.
The bikes are also insanely easy to use. I like that instead of your standard "turn up the resistance" you have a range to work from and it shows up on your little computer on your bike. It makes it so much easier for you to go at your own pace AND still get a really good workout without feeling like you are phoning it in.
The music is good, and the instructors are insanely nice. I've been to a 45 minute and 30 minute class, both equally tough and with good music. The 30 minute class just never lets up, you go right from warm-up to hills and sprints and keep going. There aren't any "active recovery" segments, it is just cardio blasting the entire time to fit everything in. For mornings that you don't have a lot of time this is the perfect way to go. 
They have a "Signature Series" that I am just dying to try because its 40 minutes of spin plus 20 minutes of yoga. It is the perfect combo.