He laughs and shrugs again. "I can sing¹, but not particularly well, and people aren't generally lining up to hear it."

¹ 'A rover, a gambler, a libertine, and often drunk, he annoyed these young thinkers by incessantly singing "I loves the girls and I loves good wine" to the tune of "Vive Henri IV."' You could make a case that Grantaire was at least partially in a musical even when nobody else was!