Principles GI Coffee House

Principles GI Coffee House coming soon! a coffee house by

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Principles is a woman-/queer-/veteran-owned specialty coffee cafe opening soon in the Red Hook section of Brooklyn. The shop is modelled after the dissident, anti-war, pro-peace Vietnam-War-era and Iraq-War-era GI coffee houses that operated wholly as coffee shops and eateries and also provided space for activist gatherings, grassroots charity and mutual aid events, and community-building endeavou

rs. Katie, the sole owner of Principles, is a Marine Corps veteran, active in the pro-peace movement, and the child of a bartender and waitress and thus she has a literal lifetime of experience in all things bar, restaurant, and cafe. Most recently, she has been a barista and manager at some of New York’s premiere boutique cafes and has devoted countless hours to professional development in the realm of coffee brewing and espresso. So much of the NYC coffee scene is taken up by serial entrepreneurs with no cafe or restaurant experience who come from money and thought it would be cute to own a cafe, because how hard could it be, right? Katie doesn’t come from money, but she’s scrappy and has a whole village on her side. It’s cliche to say that there’s no better time than now, but seriously there is no better time than *now* because the forest fire of 2020 has razed the landscape of stagnant growth and from it seeds of the next generation of businesses and ideas can flourish in the wake. The city is in a time of record high commercial vacancy and there is an overwhelming pent-up demand to gather and sip drinks in person and Principles is poised to thrive in that environment.

09/02/2026

good morning say it back 😤😤

09/01/2026

guess how many dollars this half pound of vanilla costed

08/31/2026

one of these days i’ll get to

08/30/2026

tell me what you want what you really want

honestly kinda blown away by how great the attendance at our randonneuring 101 was on monday. 🥹 real excited by how many...
08/19/2026

honestly kinda blown away by how great the attendance at our randonneuring 101 was on monday. 🥹 real excited by how many new faces are coming into the fold.

for those who are bold enough, we got a medium-difficult 200k coming up this weekend and then a super chill 125k coming up the first weekend of september.

i’m on a perennial quest to get more butts on bikes and more bikes on adventures.randonneuring definitely has a weird bu...
08/12/2026

i’m on a perennial quest to get more butts on bikes and more bikes on adventures.

randonneuring definitely has a weird but not-actually-difficult barrier to entry so Will Sherman bicycle society and i are gonna do our level best to demystify the process and invite everyone into our small-but-growing tent in the cycling community.

and right around the corner from now Long Island Randonneurs is hosting an easy 125k up and over the tappan zee landing back in red hook for a lil end-of-summer hang.

okay come ask me us questions!!

even with an A for four years running i hate government bureaucracy and permitting (if we’re gonna had foodservice permi...
07/27/2026

even with an A for four years running i hate government bureaucracy and permitting (if we’re gonna had foodservice permitting it should be pass/fail and not letter grade, esp cuz doh can be so subjective [an understatement]).

also events. come hang out in august instead of going to europe and the hamptons like the rest of park slop and bococa. 😤😤

my semi-occasional reminder that princi is indeed a coffee shop that sells Really Good Coffee™ and not just a rabblerous...
07/14/2026

my semi-occasional reminder that princi is indeed a coffee shop that sells Really Good Coffee™ and not just a rabblerousing sh*tposting machine.

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...
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?

reminding myself and everyone else here that this is a Very Serious Coffee Shop and we sell some of the Best Coffee. no ...
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.

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 t...
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.

Address

139 9th Street
Brooklyn, NY
11225

Opening Hours

Monday 9am - 1pm
Tuesday 9am - 1pm
Wednesday 9am - 1pm
Thursday 9am - 6pm
Friday 9am - 5pm
Saturday 9am - 8pm
Sunday 9am - 2pm

Telephone

+1 347-218-4290

Website

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