Yep, I used to do club promotion and DJ, and yeah, that's all very familiar. I started out as one of those ass-kissing hangers on, moved up to the point where I was playing fairly big gigs and knew important people, and suddenly people were kissing my ass, instead. It's a weird thing where the more successful you are, the more people are just willing to do stuff for you for free. There are a lot of people who have very little talent or very little to say, who nevertheless want to be heard, and a surprising amount of the entertainment industry is dedicated to taking money and time from them.
The difference between successful artists and wannabe's is vast. I once opened for one of the most popular djs in the world. He got paid something like $30,000. I got paid $200. For a gig that I bought $350 worth of records to play. And I'd have happily _paid_ for someone to give me that gig.