SideCar makes it super easy either to arrange a ride -- if, say, you've had one too many of the cognac-based cocktail this app probably isn't named after -- or, to earn a few extra dollars sharing yours with people looking for a lift, presumably to somewhere with sweet cocktails. Here's how it works:
To get a ride, request an "instant rideshare" with your hella smart phone, then watch the driver who accepts it approaching in real-time, or share their progress/ETA via text, email, or social media. If you'd rather be the driver, maybe you can explain why the Rock thought it'd be a good idea to play a guy called that in 2010's Faster, but you can definitely start offering rides/earning some extra scratch after a brief screening & interview.
SC'll expand soon, but is currently only available on Friday and Saturday nights. And while technically the whole thing's free, the app automatically calculates riders' average suggested donation, which should presumably be enough to cover at least one cognac-based cocktail the app probably isn't named after.