I've had a similar thing happen.

I was working a dish shift at a pizza restaurant, it was a full restaurant that also delivered pizza. So it's like 20 minutes before close, our delivery range was absurdly huge. Our driver had just left on a delivery that they didn't expect to be back from for 45 minutes at least. Order comes in. It's a small order for right across the street, I notice it and call up the driver and ask if she wants me to take it, she says yes. I pack it all up and head out. The total was something like 35 dollars. I roll up to the house and see a boat parked out front dripping wet, so I'm like they probably just got home and want pizza. I knock on the door and hear a very loud and angry "WHO THE FUCK IS KNOCKING AT 1045 PM?!?!" I'm like oh cool it's an asshole. He opens it and sees me and says "WHO THE FUCK ORDERED PIZZA" I'm like oh Jesus. Then some girl says from the back "I did! Pay for it!" And I'm like oh no. Suddenly he's all nice and is like "oh okay, come on in dude lemme see if I even have any cash, what's the total?" I tell him, and he rolls his eyes and leads me to the kitchen. In the kitchen are 3 attractive women in bikinis, a bunch of empty wine bottles and some broken glass in the kitchen and one of the girls is cleaning it up. He runs off. The girls are just talking to each other, clearly drunk. He comes back with a 20 and asks the total again. I tell him 35. He goes "ah that's without tip, yeah? Lemme find more cash. Girls show him your tits or something" they did. It was awesome. He continued to come out with bits of cash not totalling 35 a few more times, each time telling them to show me their tits, and one of the girls started making me grab them. He finally gets like 38 dollars and asks if that's okay. At 19 years old and having seen many beasts and touching them, I was very okay. Plus more tip than I was expecting. As I'm walking out, the girl hands me a coupon that would lower the total to 25 bucks. I tell him this and hand him a ten, he tells me to keep it and kicks me out. I'm pretty sure that guy had sex with all of those girls.

13 dollar tip, plus 2 dollar gas commission for driving one block, and then boobs. I told the driver this, and she was super jealous and angry she told me to take it. She had gotten stiffed on her delivery, so I split my tip with her since. All in all a good night for me.