Join Better and exercise in our gym, swimming pool and fitness classes. Save time and book your swimming lessons and classes online. Ballysillan Leisure Centre is located in North Belfast, on the Ballysillan Road. Our centre offers a variety of programmes including more than 22 fitness classes per week, swimming lessons, children's birthday parties and junior activities. The centre also has a 30 station gym with a functional and stretch zone. Call in today and ask about our affordable health and fitness membership options for local residents, students and corporate members. Join or book your swimming lessons and courses online today.