This has two stories on one cassette...90 minutes long.
Info from the back of the tape case:
All the Lonely People by Marcia Muller
Sharon McCone has been assigned a burlary case in which all the victums are members of a dating service. When sharon goes undercover, looking for love with the "All the Best People" dating service, she meets some desperate, lonely men. But which one of them is out for more than love?
Stakeout by Bill Pronzini
A "Nameless Detective" Story. A detective on the stakeout beat follows a "deadbeat dad" What looks like a supposed lover's residence with overnight stays and darkened rooms, turns into more than the investigator had in mind.