I'm pretty sure it's by eliade, but I can't find it on either her site or in her memories. It's a 5 things fic, and it was set in different cities around the world; I think it was a '5 dates they never went on' or something like that. I remember in one, Xander was a high powered exec and hired escort!Spike for the evening. The final one was the one that actually happened, but I only remember Xander being in an orange sweater. Ring any bells?