Also to follow-up, I was curious myself so just did a search for a party of 4... these are the results at this moment (8AM on 5/27)....
Sunday, June 10, 2018 - Sold Out
Tuesday, June 12, 2018- Sold Out
Sunday, June 17, 2018- Sold Out
Sunday, July 1, 2018- Sold Out
Sunday, July 8, 2018
Tuesday, July 10, 2018- Sold Out
Sunday, July 15, 2018
Tuesday, July 17, 2018
Sunday, July 22, 2018
Sunday, July 29, 2018
Sunday, August 5, 2018
Tuesday, August 7, 2018
Sunday, August 12, 2018
Tuesday, August 14, 2018
Sunday, August 19, 2018
Tuesday, August 21, 2018 - Sold Out
Sunday, August 26, 2018
Tuesday, August 28, 2018
All other 2018 dates are open at the moment...although there are some EMMs around popular fall dates that I expect will be the next to go.