Bubbles are a nice effect if you're Lawrence Welk.
They do indeed make a slippery mess on hard floors. And it doesn't take long for that wet, slippery film to accumulate.
Shirl and I did a wedding reception at a rented hall a few years back where someone had placed one of those little Spencer's bubble machines just inside the entrance door. We didn't know it was there 'til we started loading in... and we were slipping and sliding around on the floor.
I went around behind the door and pulled the plug on the thing. We got all loaded in and were setting up when the early birds started to arrive. Someone... we didn't notice who... plugged the thing back in. The early birds were coming in, arms loaded with gifts, cookers full of food and other assorted sundries.
It was like watching the Three Stooges ~ they were coming in the door and sliding all over the place, dropping things and swearing etc. Some of those women were wearing high heels, too. Fortunately, no one fell.
The pups were loving it... they were running around and sliding across the floor, bumping into people who were coming and going through the door. What a mess.
My recommendation ~ keep that stuff outside.