Less than 5% of the links we have are affiliate links, a few sites in the industry we noticed will only list venues that give a kickback, but we want to list everything and we've got a few other ideas of monetisation later down the link (the small number of affiliate links we have at the moment are working pretty well).

A ticketing solution is certainly one of the options we have, especially for the smaller productions which are in makeshift theatres (a fair few in working mens clubs!)