I had a blind date at one of my tables first. Seemed pretty chill at first. They seemed to be chatting and having a grand time. I guess too grand of a time as they start full on making out sitting on each other's lap things etc etc. They came in an hour before my shift ended and stayed for nine. Whole. Hours. Total. No other servers would let me transfer them as they didnt want to deal with this overly affectionate couple who were just ordering small bites. So I was stuck for eight hours after my shift ended just awkwardly trying to get them to cash out.
On the inverse of a date going bad i have witnessed women follow servers into the back serving stand pay their bill and ask if they can sneak out the back door. It's never personally happened to any tables I've served but I've been around while it happened.