They have that one already, it is called Mradi Gras or FAT Tuesday. It's when some people choose to act as PIGS.
Ok. Mardi Gras is a Christian celebration and it corresponds with the Christian feast of Shrove Tuesday. The first Mardi Gras mass was held at Point Du Mardi Gras in 1699. We actually don't know where that point was though New Orleans people say it was in New Orleans and Mississippi people say it was somewhere near Gulfport. Biloxi was the only French settlement at the time so even if it was in Louisiana state territory the claim would go to Biloxi by virtue of Fort Mareapas being the only fort in operation at the time
The first Mardi Gras celebration in terms of an outright festival was held at Fort St. Louis de la Mobile which later evolved into the city of Mobile. When New Orleans was founded in 1718, the French continued Fat Tuesday celebrations there as well. New Orleans had the first Mardi Gras flag. Mobile had the first parading organization and exported that tradition to New Orleans in the 1850s. It has been recognized as a state holiday in both cities since the 1870's.
Having grown up in one of these cities I can assure you that Mardi Gras is about many things. A celebration of homosexuality is not one of them. We do have gay and lesbian societies such as the Order of Osiris. That Osiris exists does not make the holiday a gay one. Mardi Gras is a Christian liturgical holiday and it is the last fun that you get to have before the sacrifices of Lent. That is why it is the day before Ash Wednesday. The public schools let the children out so that they can attend church, though that is a holdover from the time when Catholics used the public schools which with the exception of a few specific schools they no longer do. In the Catholic schools, you do have to attend on Ash Wednesday and you attend at the Ash Wednesday mass.
Mardi Gras is about balls, throws, family and community. It is obvious from your comment that you have never been to Mardi Gras and know nothing of what it is about. To judge it by what tourists in the tourist section of New Orleans do is completely ignorant. As part of the friendly rivalry I don't want to defend New Orleans during Mardi Gras season but I will. Most New Orleans people don't actually hang around the tourists during Mardi Gras and most of the New Orleans people are not in areas where people flash for beads. If you do that in one of the family sections along the N.O. parade route they will haul you off to jail. If you do that in Mobile at all you will be hauled off today. Mardi Gras is a celebration of the community and in Mobile, New Orleans and in most of southern Louisiana it is the most important celebration that the community holds.
The following cities hold Mardi Gras celebrations: New Orleans and suburbs, Mobile and suburbs, Baton Rouge, Lafayette, Lake Charles, Pensacola, Beaumont, Galveston, Panama City, Destin, Biloxi, Gulfport, Pascagoula, Metairie, Panama City and probably other cities I have forgotten.
Now, how many of those cities do you associate with "strong gay culture?"
Before you go insulting a holiday please learn what the holiday you are insulting is actually about