some weekends my sister and I meet up for lunch, we have gone to this thai-lunch place across the street from her job two times now, and there's a suuper cute waitress there. My sister is older than me and she's the only one of us with a job so she has paid when we've been there, and she's also the one ordering so the waitress havent even heard me say a word yet..
so that's where I am right now. I was thinking I should go there without my sister sometime

what would be a good opener in that situation?
when we left I thought of going back and telling her "hey, i think i forgot your number here" but i think I did right by not doing that ?:P