Can we here more about the infrastructure in Denver. Which cities have strong jewish presence?
Never answered this. We have two lower day schools, one is Co-ed very modern Orthodox, called Denver Academy of Torah. Many of the families with kids there are more let's say traditional than orthodox but a big range (like most OOT schools), with about 150 kids TOTAL in K-12 (HS is very small, about 30 kids in all four grade). We have a more right wing school called Hillel Academy of Denver (I put the names because Hillel is usually the left wing school in a city).

Hillel probably gets about half its about 250 kids (in K-8) from families in some form of Klei Kodesh of all different kinds. About a quarter of the kids are Chabad (mostly children of the many shluchim here), and the rest are a mixture of Yeshivish (families from the actual Yeshiva, Bais Yaacov, Kollel, Aish), Baal HaBaatim, the growing Bucharian community, etc. We have an excellent Bais Yaacov that gets girls from through out the west and even dorming from Mexico and Central America. Because of a partnership with the University of Colorado, many of the girls leave as college juniors, just from their BY classes. The boys yeshiva also has a dorm and is a solid school for certain kind of boy but it is a Lakewood Yeshiva where the boys generally need to dorm (even in-town boys), daily night seder till 10PM, etc. The majority of girls from Hillel (Lubavitch included) continue in the local Bais Yaakov and the majority of boys do go to the Yeshiva here although a significant number also go away to Chabad, Chofetz Chaim and other types of Yeshivas.
Food is total OOT, with only one Pizza shop (but it is actually good) and a market with a sit-down, solid meat restaurant attached. We also have meat and cheese at Costco and Trader Joe's. It's definitely an OOT community although with established and stable schools and populations. Mostly because of housing prices and a lack of high school options, our community is not growing exponentially like some other places. It's an amazing quality of life, with great weather, skiing about an hour away (from Nov-May), beautiful outdoors, etc. if it fits with your hashkafa and school needs.