I was running late for my rendezvous with my local YMCA's MasterFit group, so I jumped on my trusty 28 lb. old school mountain bike instead of taking the time to extract one of the road bikes from the garage rafters. I pumped the Bontrager Revolt-X knobbies to a full 70 PSI and actually managed to keep up with the group, most of whom were riding sub-20 lb 21st Century road machines. I don't think I could have done so well without my bar extensions, which greatly facilitate out-of-saddle climbing.
I was the second-oldest person on the second-oldest (1988) bike -- I was gratified to see an older fellow show up with an early 1970s Peugeot UO-8 with beautiful concave Weinmann aluminum rims and SunTour derailleurs, but the original cottered crankset. He is finally going to break down and buy himself a new bike and has been looking at the Surly Long Haul Trucker.