morning after breakfast/brunch at hotel

How do you handle the fact that the same hauppauge hol. inn (incl breakfast) can be obtained cheaper than what the hotel offers, by booking directly at HI on line right now? or is it a different breakfast? we want to invite our overnight guests to break/brunch the next morn, but do not want to pick up the cost if they book online for $98 or $118 and then stop by. obviously the breakfast must be open to all. sticky situation.

it does seem that the $119 rate posted by palebride at hauppauge marriot is cheaper than online rates.Does that include breakfast/brunch?

any thoughts on this topic, in general, or specific to the suffolk county