Recent social media posts
04/08/2026
someday i’ll figure out a prettier way to present this, but i’m just tryna get in the habit of sharing numbers right now. here Q1 2026 as compared to Q1 2025. sales didn’t go down as wildly as i would have expected, but costs went up across the board so net income was down way more than gross. someday i’ll lock into r-star and all the numbers will be well. do any of you number nerds see anything interesting in these numbers or have thoughts on how to improve?
04/06/2026
reminding myself and everyone else here that this is a Very Serious Coffee Shop and we sell some of the Best Coffee. no games. no bu****it. and definitely no fu***ng funny business that blows up all over reddit. no one has ever said a single thing about me on r/parkslope.
02/26/2026
said let’s make a post of this and i’ll bet that it doesn’t even hit triple digit likes. but if it does hit 100 likes then she gets a cookie.
02/24/2026
our quarterly ish reminder that this is indeed a coffee shop and we do peddle in some of the best coffee this country has to offer (i would say “the world” but f**knuts put so many tariffs on imports that i can’t afford to buy international anymore sorry guys).
01/27/2026
Address
139 9th Street
Brooklyn, NY
11225
To reach the coffee shop located on 9th street in New York, there are a few transport options. You can take public transportation by taking the subway and getting off at the 8th Street Station or taking a bus that stops at the intersection of 9th Street and Avenue A. If you prefer driving to the location, there are several parking garages around the area where you can park your car for a fee. However, finding free street parking around this area is quite challenging. It is advisable to use public transport if possible due to traffic congestion around this neighborhood.
Opening Hours
| Monday |
9am - 1pm |
| Tuesday |
9am - 1pm |
| Wednesday |
9am - 1pm |
| Thursday |
9am - 6pm |
| Friday |
9am - 5pm |
| Saturday |
9am - 8pm |
| Sunday |
9am - 2pm |
Alerts
Be the first to know and let us send you an email when Principles GI Coffee House posts news and promotions. Your email address will not be used for any other purpose, and you can unsubscribe at any time.
What people say
Principles GI Coffee House is a unique and inspiring addition to the coffee scene in New York. As a woman-/queer-/veteran-owned specialty coffee cafe, it stands out from the crowd with its mission to provide not only great coffee but also a space for activism, community-building, and grassroots charity events. The cafe's model is based on the dissident, anti-war, pro-peace Vietnam-War-era and Iraq-War-era GI coffee houses that operated as both coffee shops and gathering places for activists.
Katie, the sole owner of Principles, brings a wealth of experience to the table. As a Marine Corps veteran and an active member of the pro-peace movement, she has devoted countless hours to professional development in the realm of coffee brewing and espresso. Her background as the child of a bartender and waitress gives her a lifetime of experience in all things bar, restaurant, and cafe.
What sets Principles apart from other cafes in NYC is Katie's dedication to her craft. Unlike many serial entrepreneurs who come from money but lack experience in running a cafe or restaurant, Katie is scrappy and has a whole village on her side. She has worked as a barista and manager at some of New York’s premiere boutique cafes before opening Principles.
In these uncertain times where businesses are struggling to survive due to the pandemic's impact on our economy, Principles GI Coffee House offers hope for the future. It's refreshing to see new businesses like this one emerge from the ashes of 2020 with fresh ideas and innovative concepts that prioritize community building over profit margins. If you're looking for great coffee served with passion and purpose, look no further than Principles GI Coffee House on 9th Street in New York City.