If you're hosting a big shindig, you frequently need to find ways to get people home at the end of the night -- and a shuttle bus may be a waste if only some of your guests actually need it. This is where Uber might come to the rescue. It just announced the US rollout of UberEvents, a service that lets organizers pay for bulk rides to and from their venues. All you do is create an event and hand out codes to your attendees. You only pay when someone uses the code, and you can specify just when and where those codes apply so that there's no room for abuse. If you're determined to host the biggest party you can and don't want friends either paying for their own rides or crashing at your place, this might hit the spot.