Many thanks to you all for the extensive replies and suggestions.
Unfortunately a pole is a no way. Venue staff are not that relaxed
I made an experiment with a short flexible pole connected to a tripod: I was holdining it on the seat between my legs. It came to noting as I got sound inteferences, I guess from the pumping of the large blood vessel we have next to the crouch
and other contacts from my body!!!!
As for hend-holding, Italina tapers go to a great lenght to tape in a tape unfriendly environment (which is the case most of the time)
Best,
Mauro