So... Liquid is basically Airbnb for bikes, assuming Airbnb quit the successful business they're currently in, and started a service letting you make money off your sweet Huffy Pro Thunder two-wheeler. It works like this:
Rent Out Your Bike: All you need to do is set up a profile detailing your ride's stats, like type (Huffy Pro Thunder), size (for dudes older than six), location (Mom's garage), preferred rates (e.g. $10/hr, $50/day, $69/fortnight, etc.) and where you ride it -- once you're processed and approved, offers from people wanting to dance with the Thunder will pour in. After you've accepted an offer, the dude riding your Thunder God for a fortnight will come get it and shoot off likely doing a wheelie, but fret not: Liquid guarantees your ride up to $5K, which is essentially infinity Huffy Pro Thunders.
Rent Someone Else's Bike: Search by all that stuff discussed in the last section, then submit a request with how much you'll pay and how long you want it, and wait to see if that dude with one of those hilarious bikes with the huge front tire and the mini back one accepts.
To get yourself paid, they'll pool all the rental fees into a bi-weekly check you'll get via PayPal, which is sort of like Airbnb for banks assuming you don't think about it very hard, or look it up.