It depends on what I'm expected to do. If I have to talk off the cuff, then no, get me out of the spotlight. If it's my birthday and everyone is singing and cheering, then yes, gimme some sugah baby. If I'm singing or reciting a poem, I have more control over the intention of what I'm saying - entertainment and inspiration vs. persuasion or argument - so am more comfortable.
If I'm facilitating a small class for vulnerable clients, I can rise above my anxiety and focus on serving their need. If I have to give a speech or even lead a meeting for colleagues, supervisors and executives, the anxiety level markedly increases.
In general, I much prefer dyads over groups, even triads. Someone's attention is always divided, even among 3 close friends. Then there's the drain on introverts of extraverting one's energy and attention. It's draining to be the center of attention because, while it may be obvious that everyone is paying attention to me, what's not so obvious is that I feel an obligation on some level to pay attention to everyone in return. And that can be overwhelming to my ability to regulate my energy.