Why not Ryanair?
I understand the bad rep the place has but as far as i can tell from having spoken to people in the company, the majority of crew use this as a stepping-stone to other airlines.
If you are hard working and not expecting any thanks for the countless hours spent serving the public, then Ryanair offer the ideal opportunity to get that little bit of experience that will stand you in a better position to pass the recruitment for other companies. I also believe (under their own contracts) that they pay well too.
I guess what I'm saying is don't rule them out. If 'airhostessing' (as you call it) truly is what you want to do, and the people at other interviews are all older and have previous experience, then it would surely be foolish to rule out the one place that could give you a little much needed experience and a few years maturity...
just a thought..