There ain't no party like a Brighton Swimming Club party cause a Brighton Swimming Club party has TOPHATS

Members of the Brighton Swimming Club (a.k.a. "The Brighton Bulge"*) pose for a photograph in their tophats, ca. 1863. Please note time-travelling Stephen Colbert, situated dead center, delivering his trademark smirk of incredulity. Hi-res here.

* Not really, but the moniker fits. The sheer volume of swollen swimwear in this photograph borders on David Bowie levels of ridiculousness.

Photo courtesy of the Brighton Swimming Club and the East Sussex Record Office, via reddit