Maybe not the opener. Do something cheerful (or more cheerful) for that. As a second song on a set it'll be fine - shows off your range. Follow with something more upbeat.
I got given some advice by a really experienced performer when I was starting that served me well when I was doing open mics as a storyteller. Take their hand, lure them in, kick their arses and then pat them on the back, was the exact phrase.