I work at Wolverhampton council and I tell all my work mates about Geocaching. On Mondays they love to hear how many tupperware boxes we have found, new people who I tell, I normally get a sideways look and you know they are thinking, I always knew she was strange !!! but 9 times out of 10 these people come back to ask me more, I have however never converted any one to caching, even though people are interested, I think mainly because you have to spend money on a GPS and then put some effort in walking to the caches, so I don't think we have too much to worry about lining up to sign the log books.