1. Bet365 - This international betting giant offers free rounds on selected slot games for new customers who sign up 🌻 and make a deposit. They also offer regular promotions for existing customers that include free rounds.

2. 888sport - This popular 🌻 betting platform offers free rounds on selected slot games as part of their welcome bonus for new customers. They also 🌻 have a loyalty rewards program that offers free rounds and other perks for frequent players.

3. William Hill - This well-known 🌻 betting house offers free rounds on selected slot games as part of their welcome bonus for new customers. They also 🌻 have regular promotions for existing customers that include free rounds and other bonuses.

It's important to note that the availability of 🌻 free rounds and other promotions can vary depending on the region and the specific terms and conditions of each betting 🌻 platform. It's always a good idea to read the fine print and understand the wagering requirements before taking advantage of 🌻 any promotions or bonuses.

In summary, there are many betting houses that offer free rounds as part of their welcome bonuses 🌻 or loyalty rewards. Some of the most well-known betting platforms that offer free rounds include Bet365, 888sport, and William Hill. 🌻 However, it's important to read the terms and conditions carefully and understand the wagering requirements before taking advantage of any 🌻 promotions or bonuses.