Many of the Zoos have them, but often they are only with a few of the animals. The Zoo has done alot of updating their site and park trying to compete with some of the larger Zoos. From what I could find out this Zoo also claims to be the oldest formal Zoo in the US.
What this means is that toluene will ignite with a lower amount of vapour in the air. So the upshot is that Hexane is more flammable but requires slightly more vapour in the air to ignite than does toluene. Edited to correct the flash point as the MSDS I looked for hexane quoted in Fahrenheit not Celsius. I have now converted the data.
Occasional explosions have occurred when aluminum hydride was stored in ether. The explosions have been blamed on the presence of carbon dioxide impurity in the ether, [J. Amer. Chem. Soc. 70:877(1948)]. Diethyl ether and chromium trioxide react violently at room temperature. Solid acetyl peroxide in contact with ether or any volatile solvent may explode violently. A 5-gram portion in ether detonated while being carried, [Chem. Eng. News 27:175(1949)]. Nitrosyl perchlorate ignites and explodes with diethyl ether.