This idea came to me in 2008, but central London isnt particularly conducive to such experiments, so I put it on hold – until now!
Im going fishing at 5am and if I catch a suitable fish to smoke I’m going to substitute the conventional oak, manuka, etc saw dust for coffee grinds (unused)
it could be a dismal failure, but I think it’s worth a go
i look forward to reporting back
update: i struck out. i’ll try again next week on tuesday, same time, same place