I just stumbled upon a german platform called susuh.de, and they are offering a service to find local service-providers like haircutters, groceries or what ever. So what makes them unique is the ability to send a request via twitter to the platform. I personally haven’t tried the service yet (just because there’s no party to make at the moment and I don’t need a beer supplier currently 😉 ) but I think it’s the right way to get the users where they are: mobile. Just type something like „@brauche beer this evening“ and your request is posted to the platform and matched against a supplier, who dmessages you an offer. No need for registration here!
That’s a very inspiring and barrier free way to get users on your platform. Congrats to susuh.de, and good luck!