Current Mayo here - I mean, would I like to sleep until 11 every day and cram all my studying into 3x speed for four hours? Sure, but I think in the end I will be better for dragging my butt to school every day. Some of that is I'm approaching this like I'm going to be doing this as a job one day, so treating it like one now with the sort of daily commute/attendance that requires kind of makes sense. And more immediately, I hope it will make third year hit me like a smaller bag of bricks than it could have because I'm used to commuting and time away from home.
We do a fair number of stuff in small groups beyond our lectures. These aren't student-led PBLs that I hear about from other schools but usually 10-12 of us with either a TA or professor doing clinical cases and learning higher-yield/sometimes more difficult concepts. These are generally pretty well received. If you're lucky, your group and/or group leader brings snacks.
As far as how I deal with being there every day, if the lecture/group is engaging, then it's worth being there and I learn far more in person (plus you get terrific in-jokes about, say, A&W Cream Soda). If the topic isn't engaging, then I'm doing flashcards or other studying while in class. I don't do much once I get home in terms of studying because I've gotten it done at school during the day. I have really enjoyed the vast majority of our professors, and I enjoy/learn from being around my classmates every day even more. One of the hidden benefits of mandatory attendance (though to be clear - they are flexible about missing class if you need, and as the year goes on everyone gets more relaxed regardless) is that I know my classmates really well and know I have 49 other people I can turn to for most anything. I don't think I would have that if we didn't see each other every day. We're just finishing up our summer weeks off now, and I'm legit excited to see everyone again.
Plus there are occasionally communal baked goods. We are easily bought with free food.
I was lucky enough to have choices for school, with Mayo being the only one with highly suggested class attendance. I don't regret my choice at all; even if it's not your thing, I think the other benefits of the curriculum, faculty and general learning atmosphere far outweigh that part.