Looking for some great Doobie Brothers tickets for the The Aiken Theatre - Old National Events Plaza event? TonsOfTickets will make it happen with all the best Doobie Brothers The Aiken Theatre - Old National Events Plaza tickets at low prices. Look no further, you can get all your tickets for The Aiken Theatre - Old National Events Plaza in Evansville from us at the best prices online. In many cases, tickets are available for email delivery so you can get them immediately after purchasing.