While I am a Canadian citizen, and both of my parents were born and raised in England, I pretty much consider myself an American at this point in my life. I was educated here, I got married to an American here and my kids were born here. Thus, I have to admit that I am a bit of a "weight weenie" when it comes to my bikes (a throughly American trait). I didn't realize it until recently, though.
Tonight, I weighed 2 of my bikes with all of the stuff they would normally have on them.
S.A.M., my early 80's Raleigh mixte (with the addition of a rear rack and Basil panniers)-
My 2007 Batavus Socorro, pictured here with my friend Lilia, and including my front rack, Topeak basket and Bobike Junior seat...
Holy cow! Add on a 45 pound kid and various other things like my purse and minor daily grocery purchases...
The moral? If you want to you can ride anything, anywhere. It may take time to get used to it, you may need to be patient while you get strong enough to make it easier but you can do it. But, if you chose something a little less dense, I will understand : )