Strange street exchanges

My friend Mark and I were walking to lunch today (we went to a really good Indian wrap place on 46th between 6th and 7th). As we were approaching one building I noticed two women standing out front, between the building and the sidewalk proper, chatting. They looked like they were talking about—and laughing a little about—a man right in front of them. He was wearing dark clothes and a bike helmet and was kneeling to pull something out of a bike messenger-style bag. What he pulled out was a plastic bag, the kind you get for groceries or take-out—it had a symbol or logo on the side (not the usual smiley face or “I [heart] NY” or “Have a Nice Day!”) but I couldn’t make it out. As he stood up a woman walked toward us down the sidewalk, toward the man. She veered toward him, an ice cream cone in one hand and a wad of cash in the other. She thrust the cash at him and he handed her the bag. Neither of them said a word. She kept going, past him, while he shouldered his bag and pocketed the cash. Then we were past them.
Very odd, but a great scene. If I ever resume my Heller-esque novel Quagmire I plan to include it.