A few websites that may be of interest:
The Irish Cultural Society of Calgary
The Celtic Connection
The Calgary Alliance of Community Theatres (Calgary-ACTS)
Dramatists Play Service, Inc.
Samuel French, Inc.
ArtsMART Calgary
Calgary Region Arts Foundation
Theatre Alberta
Theatre Canada
Fringe Theatre Adventures (Edmonton) Fringe Festival
Calgary Fringe Festival
The Acting Irish Theatre Festival
Liffey Players Drama Society
Plays by and about the Irish