I've done various town/city rides for vv tile bagging and since I have to drop my daughter off at school at 9am and pick her up at 3pm then most of my cycling was done between 10am and 2pm, didn't have many problems at all.
(90% of my riding is urban anyway as my commute takes me almost in to central London and back each day.)
They're relatively quick to knock off and mean that, once done, you can concentrate on rides in more rural settings to increase your square/cluster.
This 3h 70km ride ticked off 54 tiles in/around Woking for example:
https://www.strava.com/activities/1947476515 (although, annoyingly, I missed one tile by not following the GPS properly). Started/finished at Woking Station which saved me having to ride to/from Putney as I couldn't fit that in to the tight timescales otherwise (I could but a puncture could have left me missing school pickup time).