Brady McCombs has an Associated Press story, “Utah gay wedding expo connects couples, friendly businesses” reprinted in the Washington Post Monday morning as “Utah expo welcomes LGBT couples” which would suggest that the expo was a general wedding event. The article notes that LGBT buying power in the US economy is about $884 billion, close to 1 trillion dollars.
Same sex marriage became legal in Utah in 2013. The Mormon church has slowly moderated its position on homosexuality, which in the past would have been viewed as a challenge to its theory of eternal marriage supported by procreation. This is really a quick turnaround for a homophobic culture portrayed in the film “Latter Days”.
I am indeed concerned about what happens if Trump, Cruz, or Rubio win the election, on same-sex marriage (although undoing the Constitution is unlikely) and on the repeal of "don't ask don't tell" and gains for transgender people, which could come back as issues. However, the most recent statements by Cruz and Rubio have started sounding a little more libertarian, as if reaching for the "freedom" vote rather than the "authoritarian" vote.
I’ve been in the area a few times, particularly in 1981 (when I do recall visiting one bar, as well as going to a classical concert in the tabernacle).
Wikipedia attribution for SLC photo by Pasteur - Own work, CC BY-SA 3.0,