Model railway exhibition
The general format is for the event to fill a church or village hall, sports centre or exhibition complex. Usually a number of 'layouts' (individual model railways) constructed by the hosting organisation will be accompanied by visiting layouts made by modellers from the surrounding districts and further afield. A second key feature is the attendance of 'trade stands' -- businesses specialising in the supply of goods and services of interest to model railway enthusiasts. A proportion of these stands are usually dedicated to the supply of second-hand (previously owned) models and equipment.
In the UK, many such exhibitions are held up and down the country, pretty much every weekend of the year.
British Railway Modelling magazine maintain a diary of forthcoming exhibitions, Open Days, meetings, talks and events: