Frank's has by far one of the best jukeboxes in the city. Its appeal is very middle brow, but it does a fine job. When the bar is a less crowded, the music tends to overpower the place, but on busy nights it is quickly cloaked by the noise. There's not much room to dance, so you'll have to do your best toe-tapping to get your groove on. In the summer months, even perfume and cologne cannot mask the smells of lots of body heat.
Cigarette smoke is also pervasive, but fairly tolerable.
There's no good way of avoiding the crowds unless you show up early. Weekends are, of course, heavily trafficked, but you can get some quiet nights on Sunday and during the week. As you can imagine, the narrow and compact space at Frank's means that it gets filled quite well. You will find that on those busy nights the crowd consists of men and women in their twenties and thirties who have just come over from other Lincoln Park bars. Conversations get loud, so you'll have to project yourself in order to be heard.