Wine Trolley for my Bachelorette

My bridesmaids rock! I am not a let's-go-to-the-Thunder-Down-Under or what-happens-in-Vegas-stays-in-Vegas kind of bachelorette. I'm super excited about the party they've planned for me in September: we're taking over Sonoma on a wine trolley.
Sebastiani Winery rents out wine trolleys for $150/hour with a 4-hour minimum. It comes out to $60/per person and less if more than 10 people attend -- which is far less than some bachelorette weekend getaways. We can drink and not worry about driving, plus we can hoot and holler. Can't wait!