October 31st is your last chance to get cheap access to thousands of bikes all over the city. Think of Capital Bikeshare like Zipcar-for-bikes: Put in your key and take a bike, and then get charged by the hour for when you use it. If you think you’ll borrow a bike more than 10 days a year, it’s totally worth the $50 cost to join now. Better than that, for rides under 30 minutes, you won’t pay a dime in usage fees. That means if you just need a quick bike through downtown on your lunch break, you can grab a bike for free and go from Capitol Hill to Georgetown without paying any usage fees.