Update hck25-2025-flatiron.md

Author: rly

content/events/hck25-2025-flatiron.md

@@ -48,9 +48,17 @@ The NWB Community Hackathon will bring neuroscientists, tool builders, and resea
 ### Housing
 Housing support is not provided. Here are some low-cost hotels that are near the venue.
 
-- [Freehand New York](https://freehandhotels.com/) - approx. $768 for 3 nights
-- [Fairfield Inn & Suites New York Manhattan/Chelsea](https://www.marriott.com/en-us/hotels/nyctw-fairfield-inn-and-suites-new-york-manhattan-chelsea/overview/) - approx. $800 for 3 nights
-- [Motto by Hilton](https://www.hilton.com/en/brands/motto-by-hilton/) - approximately $900 for 3 nights with The Hilton Sale Honors, great reviews
+Freehand New York
+$768 for queen bed, 3 nights, with code SUMMERCITY
+Springhill Suites New York Manhattan/Chelsea
+$834 for studio king bed, 3 nights, Stay Longer Save rate
+Motto by Hilton New York City Chelsea
+$898 for king bed, 3 nights, The Hilton Sale with Honors Discount, great reviews
+
+
+- [Freehand New York](https://freehandhotels.com/summer-in-the-city/) - approx. $768 for queen bed, 3 nights, with code SUMMERCITY
+- [Springhill Suites New York Manhattan/Chelsea](https://www.marriott.com/en-us/hotels/nycsl-springhill-suites-new-york-manhattan-chelsea/overview/) - approx. $834 for studio king bed, 3 nights, Stay Longer Save rate
+- [Motto by Hilton New York City Chelsea](https://www.hilton.com/en/brands/motto-by-hilton/) - approximately $898 for king bed, 3 nights, The Hilton Sale with Honors Discount, great reviews
 
 ### Travel
 Travel support is not provided.