On the one hand, you’re flattered that the bride considers you a close enough friend to invite you to the bachelorette party. On the other hand, this is a second, smaller bill associated with the wedding invitation. WeddingWire reports that the average cost for a two-day bachelorette trip is $579. And that’s what everyone is doing now – a trip. A simple night on the town just isn’t good enough for anybody, anymore. Every bride wants you to use your vacation days on her bachelorette party. So that’s accommodations, plus the limousine, the strippers, the party favors, and everyone paying for the bride’s meals all weekend because that’s the etiquette.