Hi Robert:
Amanda is absolutely correct - a bunch of Great Big Sea (and - in general - music) fans get together on a Saturday evening to play/listen to Great Big Sea and other cover tunes. All are welcome to participate in some fashion - My daughter Kate (who is 6) usually gets up to perform, while my great grandmother (92) hangs out in the back to shake an egg or a tambourine. We usually get together for dinner at Front Page News, which is right down the street from the coffeehouse.
Hope you and family can stop by! The next one is on July 29th, and I will post additional information about two weeks out from the date.