I usually find a good way to get someone interested is to say
" Hey, I got this great song book the other day with 8,500 songs in it and a way to play lots of the tunes as well and it cost nothing. Do you want one?"
This usually gets their attention then I follow up with,
"Here is the Mudcat website, The Song Book is just the tip of the iceberg"
But I find a better way is to show them Mudcat on their computer. Cheers Bill