Rental Car

We have rented from alamo and enterprise in las vegas and we were able to pick our car from a line of vehicles, does any other rental company let you pick your car ?

Some do, some dont... depends on how many cars they have available...

Some smaller places literally only have a couple of cars on hand, so they may give you a bigger car than you are paying for if they dont have the "econo" line car for example...

Pay for the cheapest car and give the yard guy a $10 tip- you'll get a great upgrade.
The only company I've dealt with that gave you a specfic car was Hertz. The rest just say pick something from Row X.

I usually ask the guy at Hertz for a foreign car (Specially seeking a Nissan Altima or Maxima) each time I'm there. They are good about getting you something you want. Enterprise, not so much.

Thrifty picked my car, but Alamo just pointed to the row and than added or the next row (which was an upgrade). Guess which row I went for.