Have you tried calling? It doesn't sound as though you are picky, and surely there must be something somewhere.... I just called yesterday and cancelled Coral Reef on the 29th, sorry I didn't see your request in time, it was a party of 7 but split at two 4 person tables, it would have worked for you, but it was 4:10pm. Anyway, I was able to change it to Biergarten for a party of 7 with no problems. So maybe you will have luck if you keep calling, the CM I spoke to said thay get openings all the time. Good luck!!