Split levels and a step in the facade create great interest, and the cladding and corner glazing finish it beautifully. CLICK http://spaceplus.wix.com/spaceplus for information on what you could achieve.
in.it.studios - contemporary outdoor buildings ranging from Garden Rooms, Home Offices, Garden Studios, a larger Granny Annexe or even a eco Home, all installed to your very own bespoke requirements. (uk)
Blackfriars Restaurant Newcastle. May be possible venue or just get some ideas from this. They do Medieval banquets anyway so would be ideal. Quite difficult to find a wedding venue that doesn't do posh food.