D.W.
None of the parties I ever attended were all that fun - maybe because we were older, all professional, and worried about what would end-up on the internet one day.
One thing I did do for my sister (as her wedding present that could easily be interchanged for your topic) was a wedding night survival kit.
We got a big box, put things in that we thought would be needed on the wedding night (you can make it as clean or as dirty as you prefer) - we included their favorite liquor, ibuprofen, bottled water, etc. We wrapped it in caution tape and included: "Warning: to be opened only by the bride and groom. Not suitable for unmarried or underage persons"
Have a great time.
My best advice is to cater it to the personality of the bride-to-be so she has the best time. I, personally, didn't like games and traditional bridal shower activities, so mine was more subdued, subtle and small (exactly as I wanted it to be).