You can spot wannabe drummers from far away. They're tapping on their steering wheels, whipping up chopstick rhythms at the sushi bar, and knocking knuckles on metal railings.
For example, you can tap a pencil against your table and map it to the sound of a snare drum. Thump a mixing bowl and map it to the bass drum. Pick out a couple of different cymbals and sync them up to a finger tap and a coffee mug.
The key is to pick objects that have very different sound profiles. That helps the app avoid confusion with triggering the right sound.
The drum sounds themselves are pretty satisfying and the app is very responsive. A classic rock drum set is included. You'll have to pay extra for ethno/jazz or electro/glitch.
I took TableDrum for a spin using objects on my kitchen table. I was quickly drumming away with a mechanical pencil, peanut butter jar, bottle of allergy medicine, and my fingertips. I've tried playing a real drum set before. Even with the app's generous help, I still sucked. I'll stick with guitar.
The app is currently on sale for 99 cents. You'll just need to work on introducing yourself to the adoring masses of your imagination. "And on drums, it's me!" The crowd goes wild.