Mary Hall Freedom House, a residential substance abuse facility, will observe its 15th anniversary during an "Imagine Gala", which will be held beginning at 7 p.m. Thursday at 200 Hannover Park Road, Suite 200.

The program has helped more than 3,000 women and children out of poverty, homelessness and addiction.

The event will include a performance of Freedom Rings, the all-female choir composed of Mary Hall Freedom House graduates and clients and a silent auction.

Tickets, which are $115 for individuals, and can be purchased  at www.maryhallfreedomhouse.org/dinnergala/ or by calling 770-642-5500.