For Day 16, I did something similar to asking someone's phone number - I asked a stranger's email address. For some reason, I had less trouble with that than I had with the phone number, even though I asked a woman. The encounter was kinda funny though, because when I asked her that she had this angry look on her face like "Uhh, no?". She did at least say no, though, unlike the guy who's pants I asked to try on :D
Day 17 was again a night of hanging out with friends at bars and clubs. It was a pretty fun night in general, but I also did some of my rejection therapy stuff in it. Basically I had to just sit down with a bunch of strangers and strike up a conversation. And that's what I did. It was pretty interesting, because it became pretty obvious to me that they didn't really want to talk to me (or they just were really shy, I dunno), but they still didn't tell me to fudge off or anything, so it really isn't a big deal.
Post any suggestions if you have any! Note, that I wont do any stuff that is actually considered mean towards anyone and I also wont lie.