These threads are usually dominated by "EVERYONE GOT SUPER DRUNK AND STARTED BRAWLS AND WENT TO JAIL" type of replies so this won't register at all, but this summer I went to a wedding (my husband's friend marrying his gf) where the invitation gave a start time of 3 PM, so we and most of the other guests showed up at 3 PM and found...an empty venue. Lights out, door locked. We all checked the invite again, and we had the right location. We were baffled. Then, at about 3:20, the bride and groom roll up and get out of their car, dressed in street clothes. They throw open their trunk and say "Thanks for coming! Everybody grab a box!" For the next three-ish hours we (all ~60+ wedding guests who had showed up on time, at 3) proceed to set up 100% of this wedding, soup to nuts. Tablecloths, flowers, bunting, chair covers, rigged up lights all over the place, hooked up the stereo, laid a buffet spread (no caterer, just snacks trays and pizza), EVERYTHING. If you're wondering where their families were, so were we! Moms and dads kind of milled around, occasionally helping, and the rest were all over 75 and pretty frail, so they couldn't help. After the ceremony, everybody spent like 20 minutes eating before we all realized that, just like there was nobody to set everything up, there would not be anybody to tear everything down. Half of the guests just took off (rather than stick around and be roped into helping), but since my husband and the groom were really close, he (/we) felt obligated to stay. So we spent another 3-ish hours helping tear down. By the end of the day we'd worked about 7 hours, and probably sat down and enjoyed ourselves & the wedding for...like 30 minutes total. And ZERO thanks or acknowledgment from the bride and groom. I literally just met the bride that day, the day that I spent 7 hours of my weekend working like a dog at her wedding, in formalwear and heels, for free.

...I'm still a little bitter about it.