Friday is Bike to Work Day, one of the few celebrations in which thousands of people inadvertently participate simply by doing what they already do. "Why is this nice person handing me coffee?" and "Where did all these people on rusty Nishikis come from?" are both perfectly reasonable things to wonder if you're already a practicing Bike to Workist. Here's some additional information to help you better understand what this holiday can mean for you:

Where is the free coffee?

Brooklyn Roasting Company coffee and KIND bars will be handed out by Transportation Alternatives reps at the following locations from 7 to 10 a.m.:

Brooklyn Bridge bike path

Manhattan Bridge bike path

Brooklyn Roasting Company in Dumbo (sponsored by Monk Fruit in the Raw)

Queensboro Bridge bike path at 25th Street

Hudson River Greenway at West 72nd Street (sponsored by Henry's Restaurant, Warner Music Group)

Staten Island Borough Hall

Joyce Kilmer Park at East 161st Street in the Bronx

Williamsburg Bridge bike path (sponsored by Timbuk2)

Madison Square Park at 24th Street and 5th Avenue

Where are the free donuts?

No that's not part of this, but there's probably a convention nearby you can crash though?

Where are the free solar-powered vibrators?

No, you missed that by like a month, sorry.

Where is the after-party?

There is indeed a party, and it's being held at the Pearl Street Triangle under the Manhattan Bridge in DUMBO from 6:30 to 9:30 p.m. There you can buy Brooklyn Brewery beer and other comestibles from Landhaus, Cemita's, Brooklyn Soda Works and Rice & Miso Everyday, in addition to shopping for gear at pop-ups from Giro, Cleverhood and REI. Ladies and long-haired gentlemen can treat themselves to a helmet-friendly braid and bike-themed nail art courtesy of Po Campo Braid Bar, which is very cool since ponytails are the natural enemy to a well-fitting helmet.

How will the weather be? Is it going to rain?

It looks like it, unfortunately. But which do you value more, dry pants or free coffee? (You'll have to choose.) The party will also be held rain or shine.

Why are some City Councilmembers biking around today? Don't they know Bike to Work Day is tomorrow?

I guess they're just mavericks. But if it leads to a wider Brooklyn Bridge bike path, then so be it:

Any tips for bike safety?

Yes! Here's our most recent guide on important cyclist safety tips. Beware the door zone, be extra cautious at intersections, watch out for the right hook, steer clear of pedestrians, and more... And here's the NYPD's bicycling safety tips brochure.

What about locking up my bike so some P.O.S. doesn't steal it?

Everything you need to know is here (scroll down) and here. Good luck!

How are you?

I'm OK, thanks for asking. A little sleepy, but generally not bad.

What else should I know?

Chrome will be hosting two bicycle maintenance workshops today and tomorrow—the first at their shop on 238 Mulberry Street from 8 to 9 p.m., the second at Friday's DUMBO soiree. The former will teach cyclists about basic bike maintenance and common repairs, and the second will involve free beer and custom patching and bag repairs.