In case you haven't heard, the women's lacrosse team is the No. 1 seed in the Ivy Tournament. And since Franklin Field will be occupied by the Heps track meet this weekend, the lacrosse tournament will be held at Penn Park. If you're into being a part of history, I suggest heading down to Dunning-Cohen Champions Field (former home of the Bubble... I mean, seasonal air structure) at 5pm Friday, where you will witness the first ever varsity game on the field (it's Dartmouth versus Cornell). If you want to see the second varsity game on the turf at Penn Park, wait until 8pm when Penn takes on Harvard. 
Tickets are $10 for students, but Penn Athletics has put together a nice deal. The team is on Locust Walk today until 2pm and tomorrow from 11-2 giving tickets to anyone who can score on a goal. Apparently it's pretty easy, so save yourself the money and take a shot!
The winners of Friday's games will face off in the championship round Sunday at noon, also at Dunning-Cohen. Definitely check it out.
Ticket info: If you can't get free tickets, Friday's tickets are $15 for adults and $10 for students. It's $10 and $5 on Sunday, and the weekend costs $20 for adults and $10 for students.