This post will discuss conditions and locations. The optimal situation will always be up for debate among serious hot tubbers, but a general set of guidelines should be followed regardless of your hot tubbing goals.
Hot tubs themselves come in all shapes and sizes depending on the needs of the soaker. For the typical Provo-ite, selection is key. One can find all sorts of variety in Provo, but the most common tubs that will be found are the cement variety suitable for multiple guests.

Also available to those who are willing to seek and sneak are wooden tubs, hotel tubs, and private tubs.



You can find the variety you are searching for in the hot tub by discretely checking with your friends, calling the location yourself, or scouting it out ahead of time. All of the above mentioned options are viable and each serves it's own purpose.
It is important to remember that almost any hot body of water can be considered a "hot tub". Temperature is a key condition that you are looking for. Too hot and you can't get the appropriate exposure and too cold leaves you feeling very unsatisfied. Kevin and I once made the mistake of getting in the Tub when it was lukewarm. By this point in our careers, we felt like seasoned veterans of the old Colony hot tub, however the poor water condition was extremely detrimental to our enjoyment. We nonetheless sat in the tub for a few minutes so as not to squander an otherwise great day for hot tubbing and proceeded to get out and run up the street to our apartment. The chilly dip is only recommended for the most advanced hot tubber. Just chalk it up to experience.
Hot Tub Rule:
The picture above of the solo-tubber is a good example of what you may find when you round the corner to your favorite spot - the dirty old man sitting by himself. This rule is situational; if you are with your male buddies and don't mind sharing, then it is permissible to strike up a conversation with the old guy to see if he is indeed creepy. You then have a choice, turn around and find your next best option tub-wise or jump in and reminisce about the good ol' days. Sound judgment is paramount here; intermediate tubbers should be able to discern and make the correct choice, novices should turn around and leave immediately. If you are in mixed company, the Rule dictates that you leave the decision to the head girl of whether you should leave or get in. She will instinctively know what to do.