When I smoked...
I'd bring the cig with me and sometimes I even smoked a puff while singing and would exhale the smoke with the words...
IF there wasn't an ashtray nearby, I'd have had no problem sitting my burning butt on the edge of your speaker, table, mixer, tv stand, the closest pool table, or even ask you (the host) to hold it (but don't sneak a drag) for me until I got going.
I'm delighted that no one can smoke indoors at a public show anymore in a restaurant/bar in Colorado.