If you agree to become his one night stand, no more scenes with him will appear after that.
I have the same issue, after rejecting the one night stand I've been going to the bar for work and drinks every night for 1 1/2 months, yet haven't seen him once. Is this common? Is there some specific months he appears? Is it if i only go to work at to the bar? Or for drinks? I'm mid-march now, going to the bar non stop since February.