Is there a crowdfunding platform for trips?

I often organise trips with a large group of friends. It is always a pain to get everybody to commit and pay in time to cover the deposits and/or book the tickets. It would be so convenient if it would be possible to let people commit similar to how people commit on a project on indiegogo or kickstarter.

I was considering using indiegogo to setup a campaing, e.g. Lets go to Paris, and start making reservations once a minimal number of friends paid and committed to the trip. However, Indiegogo aims at reaching as many people as possible, whereas I would like to limit the crowd to very limited inner circle of friends.

Does a crowdfunding platform exist to cover very small travel projects to cover the initial costs? I could of course use the conventional method by letting people commit by transfer the initial funds by wire transfer. However, the beauty of projects like indiegogo, is that people commit and only if a target is reached their credit card is charged. If the target isn't reached, I don't have to deal with all the refunds.