Playing the depression card generally works.
"I'm sorry brothers, I just so depressed right now. I simply am not emotionally ready to go to meetings, go out in FS, etc."
If they press and ask why, tell them it's personal.
Lather, rinse, repeat.
If they suggest a "shepherding call" politely, but firmly, decline. "Thanks for your concern, but I'm just not up for it."
Eventually they'll get busy on something else and give up.