A long time ago I bought 6 hotel vouchers from Groupon, but have not been able to use them because it requires 2 people staying overnight. 1 voucher allows 2 people to stay overnight in a double room for free for 1 night, but are required to buy dinner and breakfast for 2 people.
List of hotels in 16 countries:
Terms and conditions:
I can e-mail the vouchers one by one and am asking for 15 CHF per voucher. I checked from holidayplus and anyone can use the vouchers. They are valid until 31.12.2012