I've passed on the works do (only £20 a ticket, but £40 for a hotel room, or the same for a taxi home). Why pay for something that I will want to leave after about 15 minutes anyway? Pretty much the only thing I have in common with my colleagues is work, and I'm buggered if I am talking work to them all night (which would happen).
The alternative is a pub meal with a running group I head out with from time to time. Nice people, happy to talk about running, and I can walk home (well, in theory, anyway).
They've not split, but I'm having a related problem: the upper is "folding" as the foot flexes, resulting in rubbing and blistering on my second toe. It was doing it on both feet, but I've experimented with different lacing patterns (missing out one of the bottom lace holes) and that has helped a bit. Still having to tape up one toe though.