A few years ago there was KatieConf. Intended to highlight the lack of Women speakers at tech conferences
> Last night, February 3rd 2011, saw 100 students and fellows all sharing the name of Tom, gather together in a record-breaking charity event in Sidney Sussex dining hall. [...] For £20, Cambridge students with the name "Tom, Thomas, Tommy (or another legitimate variation)" were able to attend a black-tie, three-course formal dinner