Yes!

Some good news: LuLu and I went with YaYa to the lazer tag place to see whether or not she could activate the rifle without her second hand. She wanted the party even if she couldn't play, but I told her that was a decision she'd regret and that I'd probably cancel it. 

Turns out the place has what I respectfully think of as a "cripple" gun, one rigged for kids with broken arms and the elusive one-armed man that haunts Dr. Kimble's dreams. So it's for sure: the party is ON!