Dropped in to CF Max Effort during a recent trip to Vegas and had a great time.
This is a very welcoming box with lots of friendly people and really helpful coaches.
Their drop in process is super easy and is all online. I know they get a lot of visitors, so they've the process efficient. Plus you can get one of their cool shirts.
The box is a short cab ride off of the strip but is HUGE and really impressive. I would definitely stop by if I'm in Vegas again.