The vast majority of brewpub systems do not apply heat in the mash tun. The mash/lauter tun has enough insulation to maintain temps for a 90 min. mash.
RIMS and later HERMS were developed by homebrewers using uninsulated keggles for mash tuns. This was a way of working around the heat loss of the uninsulated vessel.
Most brewpubs using up to a 15 barrel system use a single infusion mash program with an occasional mash out.
The brew kettle can be either steam jacketed or direct fire. An electric boil kettle is rare.
Agitators and rakes in the mash tun are also very rare, usually reserved for systems that brew mostly lagers and whose owners have very deep pockets. They are also a HUGE PITA to clean effectively.
Hot Liquor Tanks may or may not be present. Heating the water in the kettle and then transferring it to an insulated fermenter to hold for sparging is common when space is at a premium.
For breweries located in warmer climates, a dual zone heat exchanger is common. This will have the first zone cooling with ground water and the second cooling with lower temperature glycol and water. In certain areas a cold liquor tank may be needed to help lower the temps.
Most brewpub systems do fly sparge. A goodly amount use a hydration system to mix the milled grain and water while it is being added to the mash tun.
I have tried to emulate the systems I found easiest to brew on during the time I did brew professionally. My homebrew system uses a diverter panel and hoses to make all connections. I added a whirlpool to my kettle. I mash in a Gott cooler with a false bottom as this is as close as I can get to the gear I used to use.
I based this system on the brewpub gear produced by Specific Mechanical and Newlands Systems.
The Flatbranch Brewing Co. in Columbia, MO uses a 15 bbl. Specific Mechanical system with "open" fermenters. The fermenters have a large, heavy stainless steel lid that cover the top completely but is not sealed. If you get a chance to visit, this should give you a good idea of what is being used in a lot of brewpubs.
Check out the links in my sig to read more about my homebrew system. Good luck in your quest.