Trade shows to try out tools

I would like to know which trade shows you feel give the best
opportunity to try out tools before you buy. I usually go to Rio
Grande’s “catalogue in motion” in Tucson, but I think they have
become a victim of their own success. It is so crowded in the space
that you can’t spend the time you need to speak with someone as the
elbows are sticking into your back from the people behind you wanting
a turn. I like the idea where they have the tools set up and their
suppliers present and various projects for you to try out. I was
wondering if there is another trade show or shows where it done on a
larger scale, more relaxed, more room than “catalogue in motion”.

Thanks.