The venue description is your opportunity to entice artists to match with you and to give potential guests a sense of what to expect of your space during a show.
A few things to keep in mind when writing your venue description:
What is your seating like?
Chairs? Pillows? Standing only? Bring your own seating?
What is the vibe of your space?
Listening room, party etc.
Is your space accessible?
It’s good to provide specifics here. Are there stairs? A ramp? An elevator?
Are there pets in your space?
It's helpful to specify what kind(s) of pets there are so that guests can prepare based on potential allergies / fears etc.
Feel free to include some personal information about you / those running the space, to give artists and guests a sense of you and your values.