Harold Pinter in his 1962 one-act The Collection suggested that so-called swinging London wasn't all it was cracked up to be. In the ambiguous story, a man who might be bisexual thinks his wife might have had a one-night stand with a guy who might be gay. Finally her alleged paramour's probable boyfriend puts a stop to the fun and games. The youthful Upstart Theatre Group cast don't communicate these intricate relationships right away, but under Erin Lichtenstein's direction they soon evoke a palpable tension, which enhances the wry humor when the truth is revealed--if indeed it is the truth. It's worth sitting through a classroom-level Victoria Station to see the second work on this double bill. Through 7/24: Thu-Sat 8 PM, Sun 6 PM. Breadline Theatre, 1802 W. Berenice, 773-271-2766. $15.