I will be staying at the Hilton Riverside in two weeks for a convention held inside the hold, not next door at the convention center. At $199/ night they are pretty expensive.
When I was in New Orleans for a convention at the convention center last summer, I used timeshare and "charged" my employer the expense I incurred for the timeshare for the number of nights of the business part of the week.
While it is a business expense my employer pays, my professional development expenses are capped annually, so that helped to get my money to go a little further.