What to do about programs with no attendance?

Hi all!

I'm usually just a lurker as I'm young (22) and don't often have much experience to share with others. Tonight I had a teen event that offered snacks and hot cocoa while watching one last holiday movie before school is back in session tomorrow. I personally thought this was a great idea, and have had several other, much more experienced programming librarians say it's a good program. It started about 5 minutes ago and I don't have any teens. I know this isn't the end of the world, but I feel a bit shameful that I spent city money on supplies and to pay me to be here. I had no attendance for my teen book club for the first 3 meetings before it gained some traction, and that was fine because it was a new program, it started at a time when kids were busy with the beginning of school, and we hadn't been in to schools to promote it yet. It's also a recurring program, so I knew it was kind of a waiting game, whereas tonight's program is a one-and-done, so there's no chance to recoup.

I guess what I'm wondering is how some of you have dealt with this kind of experience. I know it's not personal, but it still stings when it happens.