A.D.
Have it at a spa -- let everyone get pedicures and/or manicures ... or have an afternoon one at an antique tea room. Having a potluck and an "after baby" lingerie shower might be fun as well. Having a luau is fun too -- you could make it a theme party and serve food themed taht as well -- and have frozen drinks (virgin of course)... find something she enjoys and do THAT -- if she's a crafter, host a crafting party to help her do something for the wedding we did this for a friend of mine ... have everyone do a 2 page 8x8 layout of one of the photographs she'll have taken on the big day so that when it comes, she'll already have a beautiful, meaningful complete album.
No one says you have to be traditional. :)