freeride
Though not open until March 8th, there is an opportunity to volunteer this Saturday:
"Hope you are enjoying your winter...
In preparation for moving later this year, Free Ride is doing an inventory. We intend to document every bike and frame, starting with whole bikes this Saturday the 29th from 11am to 4pm.
We'll be using the shop computer, but if someone has a laptop with Excel or Numbers or the Open Office Equivalent or whatever that might lessen running back and forth. Absent that, we'll use paper and pencil. People might work in pairs, one examining and the other recording. Will and Carmen have come up with a basic system to use.
There are a lot of bikes. We could make use of a few people. It's also supposed to be a heat wave Saturday in the mid-30s so the shop should be pretty pleasant.
Get to know the bikes in the shop!
Discover your EAB!
Earn volunteer hours in the off season!
Feel free to bring food or lunch for yourself or to share, cookies, pie, chips, whatever; of course no food is OK too! Please note there is no drinkable water in the shop now, though there's a tea kettle and tea if you bring a bottle with water and a mug.
Feel free to contact if you think you might attend, or just stop in.
See you Saturday or sometime soon..."
I know there are a couple of essentially "good to go" suitable rides for your size available for purchase. Nothing spectacular, mind you, but they are decent.
Though I realize you are a runner, let me quote SB:
"A cyclist who is out of cycling shape from being off a bicycle for a few months or more, will start out strong, but the legs will tire rapidly. When the legs tire, the rider sits harder on the saddle, and that's when the trouble starts. Many saddle complaints are actually traceable to fatigue caused by starting out the season with a longer ride than you are ready for.
If it has been several months or more since you rode a bicycle regularly, you can expect to be sore if you ride any serious distance.
If you are coming off of a layoff of months or years, start with very short rides, maybe a mile or two, no more. Only gradually should you increase your ride distance. This may seem frustrating, but it does take a while to re-accustom your derrière to cycling. Anybody in decent shape can hop on a bike and ride 15-20 miles, but you'll be a wreck afterwards if you haven't accustomed your body to cycling first." from http://sheldonbrown.com/saddles.html
Hope this is helpful. Good luck!