I have seen this group riding around and yes, Oak, you could do this the day after the race. It looks like they are going 5-10 mph.
I did a tour like this in La Jolla/PB and I was dismayed when they took us the wrong way down a busy street to make a left. We could have acted like pedestrians if he didn't want to take the lane.
Then we had to carry the heavy bikes down a steep set of stairs on a bluff. I had to have DH do it because I thought I would kill myself
2015 Trek Silque SSL
Specialized Oura
2011 Guru Praemio
Specialized Oura
2017 Specialized Ariel Sport