(TG/whatever *SMACK to MC ahead of time*)
Right, right, I should be actually helpful here and explain the various terminology:
Transgender: basically anything gender variant.
Intersex: people with a mixture of...parts (some born that way).
Transexual: people who take hormones (and often also do surgery).
Transman / ftm: Transexuals who start female and end male
Transwoman / mtf: Transexuals who start male and end female
Gender Queer: People who don't fully fall under either gender category psychologically (think bi but for gender identity).
Gender Binary: Society's gender roles ("you are either A or B")--the absolute bane of GQ existence.
Crossdresser: People who don't take hormones or surgery, but dress sometimes going back and forth. People who identify with this group are often straight.
pre-op: TS who has not gotten genital surgery.
post-op: TS w/ genital surgery.
non-op: TS who has chosen to not get surgery.
Transvestite fetishism: According to the APA...people who crossdress for reasons of sexual stimulation and feel guilty about it.
Drag Queen: The gay equivalent term to cross-dresser, usually associated with performance and lip syncing, almost always done for entertainment or fundraising purposes only.
Butch Lesbian: Lesbians who wear typically male clothing and engage in typically male activities. Most transmen were butch lesbians at some point in their lives (often for several years).
Flamer: There does seem to be a gay male equivalent to butch lesbian, but it's less well studied (or maybe the studies I've seen have been lesbian-centric). This group is much less likely than Butch Lesbians to go for hormones/surgery later in life.
Stealth: People who look and sound so convincing that they live for years without anyone realizing they're trans. Note that hormones and surgery aren't required--take for instance the Jazz perfomer Billy Tipton--discovered anatomically female at his death at age 74.
Social revolution isn't the point of a businsess, it's to make money and provide a service. Whatever fits this best, in terms of dress code and being reasonable, is what they should go with. I can't say I expect to see men wearing makeup or putting on skirts to be socially acceptable any time soon. (TG/whatever *SMACK to MC ahead of time*) may end up a bit different, but it won't impact what is 'normal'.)
Businesses don't make laws. Governments make laws.
I doubt wearing a turban to work in Oklahoma would be thought highly of by the employer, but the government protects that.
I suspect businesses would be dumping toxic waste into the nearest river if allowed, but government prohibits that.
Fundamentally, businesses will do whatever most selfishly profits them...unless they are legally barred from doing so. Being an early adopter on LGBT acceptance would put a business at a competitive disadvantage. If every business was forced to respect LGBT rights by the government, though, suddenly there's no competitive disadvantage.