well I feel stupidly mixed..how awkward am I ? (Don't answer that) So, sometimes I hate last minute because as others have said, I haven't planned, might not have washed my hair, that sort of thing.Then on the other hand if someone invites me to something too far in advance, I start to feel anxiety about what to wear, who else will be there, how I will get there or get home, if I am expected to eat or not eat etc etc.
What really annoys me though is getting asked out like the OP at a later time, but unlike the OP , on a couple of occasionsI received an invitation to meet up at 2.30-3 then when I've got there, after about half an hour , everyone orders a late lunch, I haven't been told we were to eat out and I had lunch before going so then have to sit there while everyone else eats and it makes it look like I'm too mean to buy lunch out. I find that highly embarasssing.