I had planned a trip for me and my mom last May. My husband had said he couldn't go (as one of his coworkers were already off that week for health reasons), so I made ADRs for two (including one at BoG). About a month before we were due to leave, my husband was able to get off work afterall and decided to join us. I tried several times a day for that month to get an ADR for three, but was unable to do so. We decided to go ahead and show up to see if they could add him, but had also decided that if they couldn't, it wouldn't be a big deal and he'd just go get a pork shank over at Gaston's Tavern and we'd meet up afterwards. When we were checking in, there was a large party a couple of people ahead of us, who was loudly arguing about adding three people to their party. They were really insistent and obnoxious to the CM. Apparently they were told it was not possible and finally some of the party stalked off (actually more than the three that had been denied entry). The rest went on across the bridge. When it was our turn to check in, the CM asked if she could help us. I laughed and told her I had a reservation for two, but my husband's boss decided at the last minute to be nice and let him off. However, I had not been able to change my and my mom's ADR to three people and was hoping he could dine with us, but I understood if they couldn't and it would not be a big deal. I'd just send him over to Gaston's. The CM laughed and made a comment about 'no, there was no way the Beast would be so inhospitable and they definitely did not want him having to dine with that nasty Gaston and to let her see what she could do'. She almost immediately gave us a beeper and sent us over the bridge. The people who had tried to add three people to their large party were standing up there and still fussing about some of their party being turned away and how they all should have left. One woman said there was no way they were paying $10.00 a piece for being a no show. One of the men, argued that they did show up and it wasn't their fault Disney wouldn't seat them, so no way could they possibly charge them as no shows. The woman told him he could leave if he wanted to, but she and her family were staying and she'd warned them about trying to add the other family. I guess it depends on the CM, how polite you are, how many people you are wanting to add, and the fire codes limits of course.