I'm seeing a 3rd night free promotion that's stackable with the Travel Leaders Select perks:
- complimentary breakfast for two daily
- upgrade based on availability at time of check-in
- early check-in / late check-out based on availability
- $100 USD food and beverage credit per stay
- free wifi
(stackable with any status benefits and eligible for stay/night credit and points accruel)
Presumably the same promotion is also available via Virtuoso and possibly other cosortia/programs.