Spontaneous Speaking
Introverts instinctively think before speaking. Small talk demands a more spontaneous style, which doesn't work for introverts.
SOLUTION: Have a handful of 'filler phrases' to buy time to think.
Deep v broad conversations
Introverts love deep conversations. Small talk tends to be broader and more shallow, which is a turn off for most introverts.
SOLUTION: Ask people what they love talking about & go from there.
Talking is Tiring
Talking & interacting are extroverted pursuits. Constant conversation soon empties the introvert battery.
SOLUTION: Talk less by asking more questions.
Prefer 1-1 conversations
Introverts are more comfortable speaking with one person than entertaining a crowd.
SOLUTION: Seek out fellow introverts. You'll usually find them hanging alone near the refreshments.