I come from a very large Jewish community. I grew up in the metropolitan area of a big city and the majority of the Jews in the suburb I grew up in were unaffiliated. There are like three yeshivish families there because two of them run shuls and the other one is stuck in that suburb because it is very difficult with mortgages and stuff.
The rest of the frum community is completely modern orthodox, and I daven at the modern orthodox shul because that is where my friends all are. The minhag hamakom is not to cover your legs, however, I do because as I have become very close to the yeshivish part of the nearby city, and aspire to lead a yeshivish lifestyle, and covering my legs is part of integrating into the yeshivish community, along with taking on a ton of other nuances as well that the suburb I grew up in does not necessarily take on.