No visit to ibis Styles Adelaide Grosvenor is complete without spending some time at The Federal Restaurant and Bar, the signature onsite restaurant at Mercure Grosvenor Hotel Adelaide. Stop in for a delicious buffet breakfast at The Federal Restaurant on the hotel’s mezzanine level. Bathed in natural light, the restaurant is open every morning from 6.30am so you are sure to get your day off to the right start.