I'm a big advocate of people doing this, and if I do something for people and they want to give me something back, I say, 'pass it on'.
I had three complimentary tickets left on the last day of Art Melbourne, valued at $20 each. I looked at them and wondered whether to throw them out or be creative.
As I was going to the front entrance, I looked around for friendly people and spotted a woman going in on her own. I called her over and asked whether she was paying to go in and she said yes. I handed her a ticket, and she nearly hugged me ..... so excited.
I found a young couple and did the same, with the same result.
I got more of a charge out of doing that than anything else over the four days.
Try it; it's a really excellent feeling.