Stephanie, ask for what you need girl! It will be better for both you and your employer. :) It may feel weird to bring it up, but it's totally reasonable to say, "As an introvert, I love collaborating, but I also need to recharge with a couple hours of solo work. Could we possibly find a quiet space for me to use now and then, or build in a couple of remote hours?" You won't lose a job offer over this, and I bet the right employer will love that you're asking for what you need to do your best work.