Thanks RonH,

I think that's a good idea. The Houston group has a bunch of different ride categories. This is pasted from their web site:

"O" (Orientation) Rides
Perfect for the novice. Rides are short (20-30 miles) and guided by experienced riders.
"EZ" (Easy Rider) Rides
Good rides for beginning riders. Short (20-25 miles), in-town rides led by an experienced cyclist; leisurely-paced with lots of sightseeing stops.
"GR" (Group) Rides
For intermediate riders. Medium length (25-40 miles), leader-led rides at a 12-15 mph pace.
"MP" (Mid-Paced) Rides
For intermediate to advanced riders. Medium-length rides at 16-20 mph.
"TR" (Training) Rides
Long rides (50-60 miles) in a fast (20+ MPH) paceline.
"TT" (Time Trials)
Riders start at one minute intervals and are timed on a short (10-20 mile) course.
"DD" (Dirty Dozen)
Century rides (100 miles) for those who plan to ride 12 centuries in a calendar year.
"S&E" (Slow and Easy)
Century rides for those who aren't sure they can do a century. 11-13 mph with no sags but frequent stops.
"ATB" (All terrain bikes)
Offroad 20-30 mile rides, all or mostly on dirt or gravel roads.

I know I can handle the Mid-Paced rides, so I think that would be a good starting point.

--gordon