Seminars are a prime example of where generations are together. People coming together into the one place to learn new things despite age or walk of life.
Whether it be a seminar on learning, presenting or showcasing. All sorts of people will join to witness the event and see what they can take from it.
At times of course there will be specific target markets, but for the most part there will and is great diversity which is great for sharing and learning off each other as well.