Richard Branson is a good example of an "adventure capitalist".

Here is his Wikipedia profile:

http://en.wikipedia.org/wiki/Richard_Branson

Here is the Wikipedia page for his space tourism company:

http://en.wikipedia.org/wiki/Virgin_Galactic

Also worthy of a mention is Mark Shuttleworth, who was the world's second space tourist (and also the founder of the Ubuntu Foundation):

http://en.wikipedia.org/wiki/Mark_Shuttleworth