Are you spontaneous person or do you need a plan?
I think with me it depends on what I am planning or spontaneously doing.
If it's supper, sure thing... I'll go anytime... but I also like to plan to go out to supper so I can savor the menu looking it over ahead of time to see what sounds good and look forward to it.
If i'm looking forward to a night at home relaxing in my skivvies watching tv then no, i do not like to have someone spring something spontaneous on me. I feel like I've already planned to relax and if it doesn't happen then momma ain't happy. Well, except for watching my grandbabies... i will do that ANYTIME.
I have found that sometimes when I've planned an evening get together with friends, I look forward to it up until about an hour before and then I dread going... isn't that strange? It has been happening a lot lately. Last Tuesday, we had some friends call and say they were coming to visit from Austin, TX and they wanted to get together at another couple's home on Saturday.. it sounded fun so I agreed but when Saturday rolled around, I just wanted to stay home. Weird...
I think I used to be a whole lot more spontaneous than I am now.... I must be getting old.