I don't remember this performance well, but I know I wasn't making this face the whole time. I seem to remember someone catcalling from the audience and this was probably my reaction to that.
Interacting with my audience is something I look forward to in restaurant shows like this one. Its these moments that make the difference between experiencing the moment or just watching the flat screen. Sometimes we get so used to watching television or internet videos that we forget that we have the power to interact with live shows. Have you ever performed for a seemingly unappreciative audience only to finish the show to a standing ovation and rave reviews from audience members? I have seen this over and over. Someone will sit, watching the show with a look that to me reads "I would like to be anywhere but here", only to approach me after the show and say that was the most fun they'd had all week. What's missing here? Did they just forget to smile during the show? I've learned over the years that American audiences especially, need to be invited to participate. They need to be shown how to express excitement during a performance. If you've been to my community shows, you've seen me introduce myself before the start of the show and invite people to make noise and show appreciation to every dancer during the performance, but more importantly, I make a point of inviting the audience to smile and enjoy themselves while I'm dancing.

Here are my super simple suggestions for such an invitation:
1. Start the audience in a clap. This one is super easy and you see it all the time with professional entertainers. If you don't already do this, it's time you should. Clapping is universal and helps people make noise in time with each other without needing to say a word. Even the most shy of observers will participate in an organized group clap.
2. Smile. This one is also super obvious, but I can't tell you how many dancers, even professionals, forget to do this. Adding a smile to a hip circle tells the audience that you are having fun, you are confident, and that it's okay for them to enjoy watching what you are doing. A smile is an invitation. Invite your new audience friends to feel joy.
3. Make eye contact. So simple, right!? Eye contact brakes the wall of just watching and brings the audience member into the show. When you look right into your audience members eyes, they start to feel like the dance is for them. When I dance, I try to look into the eyes of all of my audience members. This isn't always possible depending on the show, but when I make eye contact, I can feel the excitement of the room and that makes the dance that much sweeter.

So go forth and interact! Have fun and they will too.