Recumbents come in many styles, just like DiamondFrames (DFs).
I have a "race" bike, called a highracer that would not be good for what you want - 2 wheels, high off the ground...
I have a commuter that has a smaller front wheel, allowing me to sit more upright.
I just sold my trike. I loved it, and it could get going well. The negatives are that it will be somewhat slower, they are lower to the ground so possibly not as visible, and they are marginally wider than a bike but perceived to be much wider by people. They are also expensive. If I had the money and was about to buy one, I'd get a Greenspeed Anura.
I have a velomobile.

But, all of these have different riding characteristics than DFs, so can be hardish to ride in groups. It also depends on the group mentality - my local bike club is wonderful, and only rolls their eyes at me behind my back . seriously, though, you can get around DF riders that are worse than the worst bike-hating SUV drivers about bents. Or not, it just depends.

I highly recommend heading on over to BROL and hanging out for a wee bit.
http://www.bentrideronline.com/messageboard/index.php?