Any ideas?
My favorite venue here in KC (Knuckleheads Saloon) are very friendly
to me (and my buddy Nick) so we have established a clamp(s) inside
and outside (two stages in this venue). Inside I've got an orange
"C-clamp" from Home Depot on a wooden pole, that supports the roof,
that you can attach a super clamp to. The "C-clamp" stays there all
the time. For the outside stage, there is an I beam that spans across
the front of the stage that I keep two super clamps on the bottom flange.
In my case these are really just for ambience since I pull a sbd patch
to mix with them. Works pretty damn good.