The ESC has free tutoring every Monday night from 6-8 in Ingels Hall. It's specifically for engineering students and focuses mainly on the first few classes that they usually have trouble with like chemistry, physics, calculus, etc., but the ACM will have three people there tomorrow (10/19) so it would be a great opportunity for CS students to get some help. On other weeks there are different groups that tutor, but they're all engineering groups so they should be able to help CS115 students. There may be free pizza as well.
Here is the schedule for the rest of the semester.