inviting coworkers to bridal shower/wedding

So I work in an accounting office with 3 other girls, and the scheduling office is separate and down the hall. I really want to invite the girls from accounting office, but ive seen online that if you invite one coworker, you have to invite them all. there are 10 + people in the scheduling office, and I don't have room in my budget to invite that many more people to my wedding. is it considered rude to only invite the girls since I mainly work with them and I'm closer to them than I am to the girls in scheduling?