This is how it works at UMass University hospital:
As an intern, we admit 2 patients per day from 7:00am to 5:30pm. Every 4th day we are called "late stay" and on this day, we do admissions from 5:30pm-7:00pm. At 5:30, unless you are late stay, you sign out to the nightfloat intern who covers all housestaff patients from 5:30pm-7:30am. He/she is only responsible for managing patients on the floor over night and does not do admissions. The nightfloat RESIDENT is the one who does the admissions overnight. In the morning, each of the interns is assigned one of the admissions which was worked up from over night and this goes towards your total of 2 admissions for that day. This leaves you with one admission sometime during the day to work up and admit. On weekends, we have a possible 3 admissions/intern since we have more time (no rounding on weekends). I think this works pretty well, as I get ample exposure to the treatment and management of patients without over night call (unless you are nightfloat which is more like shift work: 3 days at University, 3 days at Memorial, 3 days off). I have yet to do nightfloat, so maybe I'll hate it after that! I know for now I am enjoying it much more than q4 in medical school.