There needs to be a counterbalancing variable, though; presumably you want to live in a city, otherwise you'd just live in the countryside somewhere with a TTS of zero :) Maybe the other factor is "time for pizza to arrive at door"?
there's presumably pizza in the smallest towns tho, I'd suggest Time To Theatre. Not because of the Theatre per se, but because "big enough to have a theatre" is probably a good proxy of "big enough to be appealing to people who enjoy something other than nature".
In Indiana, my favorite dinner theater is in a town of 500 people.
For a while, someone was trying to start a theater in an even more remote spot, an unincorporated community about an hour from there with maybe a dozen homes nearby, but they finally moved it to a large town.
I think by "theater" the OP was implying professional theatre. Lots of small towns have theater, but professional theatre is a much higher bar.
In my case, my old workplace in Ottawa, Canada had a "time to moose" of about 5 miles and a "time to theatre" of about 1/2 a mile. Sadly, the professional Opera company in Ottawa went bankrupt so we only have amateur Opera now, but we do get regular professional Broadway productions so it still counts.
Not sure how it is in Ottawa but here in the US Midwest distances are frequently measured in units of time. I might say I'm an hour from Green Bay or two hours from Madison, though I don't remember the actual mileage. That said, it usually only applies to distances over 20 minutes (between 7 and 25 miles, depending on speed limits).
That practice is pretty widespread in Canada. Ever since metrification nobody is really sure whether the person they're talking to is more comfortable with miles or kilometres. So they just use time.
