Though some here will frown on it, one way you can make the recording a bit louder is to use the HARD LIMITER function in Audacity, which effectively flattens the peaks above a certain limit you set. You have to be careful with this, as if not used sparingly, you will get distortion, but to knock a couple dB of hard snare hits or whatever, I find it's fine.
Select all Audio, go to AMPLIFY and see what you need to amplify to 0. Say it says 5.6.
Add a couple dB to that and then HARD LIMIT to that value. So in this case, -7.6.
Then, after hard limiter has run, amplify to -0.1dB. As I said, you have to be careful about this, and 2dB is only a very general guide, but I have found that usually doesn't do any damage and gives you a bit more volume. With clapping, especially between-song clapping during a show, I'm less worried about hard limiting it, even if it distorts a touch, since the clapping isn't music anyway.
But really, how hard is it to turn up a volume knob?