I'm just trying to organise something for saturday. If the weather is ok I'd like a fancy picnic followed by a few pubs and bars. Thanks to facebook I have invited a load of people I don't really want to spend my birthday with. Would it be unreasonable to cancel the whole thing and then reinvite the few people I actually want to be there? Some people would have had to travel up from london (to edinburgh) but as far as I know only my sister has actually booked tickets.