Small wedding venue ideas?

I'll be getting married next year with a small party of around (maybe under) 15 people attending the ceremony and reception. We don't want anything fancy or traditional, but we do want to have a nice little party with a cake and some champagne. It's hard to find a venue for such a small wedding party, so I need some ideas I can pursue. Churches and chapels aren't an option for an atheist couple, so secular venue ideas only. Thanks!