BlackLight Volleyball: we played with both a traditional volleyball as well as a balloon. The balloon proved to be super fun and really held the kids' interest for a long time.
Human Foosball: we did this game with long pieces of pvc pipe and glow in the dark tape to mark lines on the floor. Kids stood in pairs and held an end of the pipe. We used a kickball as the ball and kids battled to kick their teams ball into the other team's goal while remaining on their taped line. They could only go from side to side.
Dodgeball: many rounds of traditional dodgeball got the kids nice and sweaty, and one adult came away with a twisted ankle. (We are hardcore like that.) After a while we switched it up, we took out a TON of toilet paper and put those on the line as you do in traditional dodgeball and let the kids use those in place of the balls.
Some things we learned the hard way: not everything you think is going to glow will glow! Make sure you test everything ahead of time. We had purchased a ton of this tape from Amazon. It came in super handy to outline things. One thing we hadn't expected to use it for but were glad we had it on hand was to stick it to things that weren't glowing. We ended up using it on some of the toilet paper (believe it or not, the quality of the TP does matter when it comes to glowing!) and on some of the balls that were harder to see. Using small 1-2" pieces, we just randomly taped them all over the balls and things and made them so much easier to see.
Here are the balloons that we used during volleyball and at various other times. Most of them glowed. Some of them didn't! Be prepared.
The pics don't do this event justice. The kids had a ball and this is an event that we may do once per year.