Personally, the Market Street El side of the MFL is definitely the safer side. I’d say green light Girard-40th, Yellow Light 40th-69th, I really try to avoid the Kensington Avenue El. That said, the whole thing gets sketchy after about 8:30, so I don’t know how early your early evening is, but I’d be done by then. Most of the crime happens between 9PM and the wee smalls above Kensington Avenue. A little situational awareness and common sense with the rules above will (probably) keep you safe. As for trolleys, PCC testing is really ramping up along the 15, so you might be able to catch one. Most of that route is safe. Otherwise I like the 10. You could take the El to 69th, 65 to Malvern Loop and the 10 back to Center City, or the 10 to the 15 to the El at Girard and back to CC. The Lansdale/Doylestown is a fine line, but the Media/Wawa is really nice especially Wawa Station and the Crum Creek Viaduct and the Manayunk/Norristown along the Schuylkill is the same. I don’t know if you’ve ridden either. An often overlooked trip is the PATCO over the Ben Franklin and out to Lindenwold. It’s really nice. The BSL going to see the Phils is a whole cultural experience if you want to see that.