So my fiancé and I are planning our wedding, and we sent out invites a month before our RSVP date, saying at the bottom of them "Please RSVP by *date*." It's an outdoor wedding, but my fiancé is making it semi-formal and we're renting tables and chairs and getting tablecloths, chair covers, sashes, etc, so everything matches and looks nice. The location is on my parents property in the small town where I grew up, and so it turns out that a lot of people don't feel the need to RSVP before showing up. We wanted a small wedding, only up to 50 people, and we've now stretched our accommodations to 72 (nine tables with eight chairs each). The RSVP date is almost three weeks past, but then I hear from my parents that so-and-so is really excited about coming, but they didn't RSVP. Other people RSVPd for only 2, but it turns out they have more in their party (again we learned this by coincidence through my parents bumping into people in the town). Is it okay to tell people who show up without RSVPing that there's no chair for them (and possibly no cake) because we had no idea they were coming? We sent out very nice invites with a clear RSVP deadline. If we don't know if someone's coming, how could we possibly make sure to accommodate them? We're on a very low budget too. What would you do?