Butts and ashes go in the ashtray on the porch. If they get annoying, they then go in a covered trash can on the porch.

Last Summer my little brother and I were having cigars on the porch while he was going over my black powder weapons. I have a little 20 ga side-by-side black powder shotgun he liked a lot. When we finished our smokes I loaded it with powder and wads, but no shot. I dropped a butt down each barrel, drew back the rabbit ear hammers, and let both barrels go at once. It blew the butts to smithereens!

My wife came out and started lecturing us about playing with firearms while drinking, and said no more shotguns today. I said something about there being more butts in the ashtray still, but she shot me down by saying if she heard one more shot she would call my little brothers wife (who we are all terrified of). I cleaned, and put away the shotgun right away.