How can you turn something everyone already loves into a fundraiser? Add-ons and markdowns. By partnering with a local spa, your event attendees will pay to enjoy the basic services — sauna, hot tubs, champagne, snacks — and a portion of any add-ons they schedule can go to your cause. Be sure to book in time slots so you can maximize your time at the spa (and make sure they understand that the service providers aren’t working for free and still require a tip!).