According to an article in The Independent, the Adams Park ground of London Wasps is the smallest capacity at 10,000. For a full breakdown of the capacities of all Premier Rugby clubs visit: http://www.independent.co.uk/sport/rugby/rugby-union/news-comment/home-from-home-clubs-grounds-and-growing-pains-936214.html
The team that has its home ground named Celtic Park is Celtic FC.
Dens Park is the home ground of Dundee F.C. and Tannadice Park is the home ground of Dundee United F.C.. They are in the same street, Tannadice Street, in Dundee.
The team that has their home as Borussia-Park is Borussia.
Griffin Park
The team that has their home ground named Signal Iduna Park is Borussia Dortmund in Germany.
kosiosco
West Ham home ground - Upton Park, Newham.
Eden Park
around 16000
At present, Newcastle's home stadium is St. James's Park
Aston Villa's home ground is called Villa Park.