Where are Stella and Blanche going while Stanley play poker?

In Tennessee Williams' play "A Streetcar Named Desire", Stella and Blanche are going to the movies while Stanley plays poker.

This is a crucial moment in the play, as it sets the stage for Stanley's aggression towards Blanche. The scene immediately following their departure sees Stanley lose his temper and unleash his rage upon Blanche, marking a turning point in their relationship.