PHILADELPHIA (CBS) – The city’s efforts to crack down on mob violence in Center City appears to be working.

In all, police took 72 teens into custody this weekend. 50 on Friday night and 22 Saturday evening.

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Mayor Michael Nutter attended a bowling tournament for teens last night in Juniata. The event was organized by city leaders who plan to host more events for teens looking for something to do.

“There are a ton of positive things they can do,” said Mayor Nutter. “We have to step up, we the city government and the entire city need to step up do more. They’re (referring to teens) are trying to tell us something and we need to listen.”

“Those who want to do good things; we’re going to provide a lot of opportunities, a lot of options, a lot of places for that. Those who don’t either need to get the message real quick or there is an alternative and it’s a negative one for them,” said the mayor.

Philadelphia Parks & Recreation Sites with Extended Hours:

Northern Liberties Recreation Center – 321 Fairmount Avenue

Murphy Recreation Center – 300 Shunk Street

Vare Recreation Center – 2600 Morris Street

Myers Recreation Center – 5800 Kingsessing Avenue

Christy Recreation Center – 728 S. 55th Street

Kingsessing Recreation Center – 5000 Chester Avenue

Shepard Recreation Center – 5700 Haverford Avenue

Gustine Recreation Center – 4863 Ridge Avenue

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Gathers Recreation Center – 2501-19 W. Diamond Street

Athletic Recreation Center – 1401-27 North 27th Street

Vogt Recreation Center – 4131 Unruh Street

Samuel Recreation Center – 3539 Gaul Street

McVeigh Recreation Center – 400-64 D Street

Feltonville Recreation Center – 231-37 East Wyoming Avenue

Lonnie Young Recreation Center – 1100 E. Chelten Avenue

Happy Hollow Playground – 4740 Wayne Avenue

Olney Recreation Center – 100 E. Godfrey Avenue

Lawncrest Recreation Center – 6000 Rising Sun Avenue

Simons Recreation Center – 7200 Woolston Avenue

Fox Chase Recreation Center – 7901 Ridgeway Avenue

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Reported By Jericka Duncan, CBS 3; Dan Wing and Suzanne Monaghan, KYW Newsradio