Conversation so far:
What was the Max Weinberg 7?
The Max Weinberg 7 was the show's house musical act, led by E Street Band drummer Max Weinberg.
When did the Max Weinberg 7 join the Late Night show with Conan?
The Max Weinberg 7 was the house band for Conan O'Brien's late-night talk show Conan from its debut on November 8, 2010.

Question: What instruments were played?
Self-contained rewrite: What instruments were played by The Max Weinberg 7?