I use the following anecdote all the time when people are at events for the first time.
I remember a moment at the beginning of that event when nothing in particular was going on and you were sitting at a picnic bench with an introspective look, so I asked, 'What do you think of all this? Think you'll do it again?"
You just smiled a little and after a long pause you said, "Ask me again when the weekend is over."
Soo...four days later I found you sitting at one of the tables again and nothing was going on at the moment and I asked, "So, what do you think of all this?"
After an equally long pause, you admitted that until that moment you weren't sure you'd be the kind of person to do this sort of thing, but how you were now convinced you'd be doing it for a long time. It was an understatement of course, seeing as how you've been to nearly 10 times the number of events I've attended.