This came up in the grand slam.
Club Carlson and Best Western will allow you to transfer points.
Hilton allows transfer but it costs $25 for every 10k points. I think you can transfer HH points into any person's airline account for no fee but am not sure.
SPG will allow transfer between accounts which have shared the same address for more than 30 days.
Wyndham Rewards points can be transferred to any person's airline account.