Fleischmanns Gin

I'm not sure what you mean by "Fleischmann's gin" in restaurants in the USA. Fleischmann's is actually a brand of active dry yeast, not gin. It is commonly used in baking, particularly for making bread dough rise.

If you meant to ask about a different type of spirit, gin is a spirit flavored primarily with juniper, imparting a flavor and aroma reminiscent of pine. Gin originated in the 17th century in the Netherlands, and became popular in England, particularly in the 18th century. Today, gin is enjoyed all over the world, and there are many different styles and brands to choose from. If you have any specific questions about gin, I'd be happy to help answer them.