BJJ in Littleton / Centennial, Colorado

I was in Denver and had the opportunity to train at Easton BJJ in Littleton.  Easton BJJ has six branches, which I was at a South Denver suburb branch.  This was my first time training at a larger school, but there was little difference except in their being a well organized curriculum.  My impressions:

• Very welcoming to a drop in - it is a little intimidating/awkward showing up at a new school to train just for a night - they were very friendly and accommodating.  Thanks!
• They required an instructor to watch you roll before attending class or sparring - meant to monitor the spazzes - safety measure. 
• Floated/elevated springy mats were very nice.
• They had separate Beginner (up to 3 stripe white belt), Intermediate (above 3 stripes), and Advanced classes, which seemed like it could make it easier for a beginner to start training to only spar with fellow noobs (or more spastic).

My biggest impression was the uncommon number of Over 40 folks.  I asked Head Instructor, Chris Stolzman, about the gentrified popularity of his school.  He noted that they had a well attended kids class and many of the older folks were parents.  Another instructor responded to my question on the percentage of aged students, "this intermediate class here is pretty typical, it has 2 of 10 people over 40, so 20%."