The system they're thinking of is four MUZ-D36NA units. I see these listed as having a cooling capacity of 36 kBTU/hr each, and a person dancing puts out ~350 BTU/hr, so it looks to me like this should be able to keep up with a full hall of dancers?
It's designed for pre-rendering. The AMP JS knows when it's being speculatively rendered and prioritizes the most important and cheapest things. Additionally, this pre-rendering can happen in a privacy-preserving way
In contra dance you take one step for every beat of music, and it's all built around powers of two:
Being the name of a historically oppressed group of people, over the past few years there's been a push to switch away from the term. People suggested alternatives and debated their merits, callers tested them out at dances and figured out what worked, and at this point it looks to me like we're landing on "right shoulder round". Examples:
So one question, then, is whether the display ads business is overall positive or negative for the world. I think it's generally positive, despite some downsides: the majority of websites are funded through ads, and this has allowed an enormous diversity of information to flourish. I can afford to write for fun and run this site without ads on it , but many people with interesting things to say can't. The New York Times can convince some people to pay, but a subscription-only web would be much worse. Overall, ads are a very progressive and democratic way of funding things: everyone can read and everyone can write, not just people who can pay.
On the other hand, it's not ideal. Ads are often annoying, and can get in the way of what you're trying to read. They can be slow to download or execute and delay the rest of the page. Similarly, they can download large images or videos using up your metered data plan. While sometimes ads fill a beneficial function of informing you about something you'll honestly be better off from having purchased, other times they're trying to convince you to spend your money foolishly.
Since there are only ~300 contra dances and ~40k zip codes I decided to do everything client side. The browser downloads a file of dances (json) that looks like this:
... ["http://www.nbcds.org/", "Santa Rosa CA", "Fridays and Saturdays", 15, 38.44, -122.71, ""], ["http://www.nbcds.org/", "San Rafael CA", "Saturdays", 12, 37.97, -122.53, ""], ["http://www.nbcds.org/", "Sebastopol CA", "Saturdays", 12, 38.4, -122.82, "Larks / Ravens"], ...
And a file of zip codes (json) that looks like this: