High rises, condos, garden apartments are disproportionately progressive. So, if progressive candidates are to win their elections it is necessary to reach out to occupants of closed communities. Here is the section of my book where I talk about that:

Closed communities

As I said before, but it bears repeating, closed communities are easy to organize from within and almost impossible to organize from without. Seek out opportunities to converse with people who live in closed communities. Ask whoever is in charge of your local committee’s database if you can have a list of past volunteers who live in that gated community or high-rise. …

… Once you have identified someone within a closed community, you can began to plan how to work that community. Would it be acceptable to post brochures and/or sample ballots on community bulletin boards or leaflet every door, and so forth? If you are fortunate enough to have recruited a precinct committee you will need to set up an email list. I don’t recommend using Yahoo or Gmail, because not everyone wants either a Yahoo or Gmail account. You could use ListServe, but that costs money. Since we are talking about a small group, just set up your own list and be sure to cloak under BCC so that users are not plagued by excessive reply-to-all. One word about email, email is a great way to send specific information. It is a poor way to move people to action. If you want someone to show up and actually do anything, you will have to call them on the phone. Phones move people to action, email does not.