I think we'll need more information. Is this a stroke story primarily intended for guys, or a more realistic portrayal? Your scene will play out very differently with each one.
Basically, women aren't as heavily invested in the whole one-night hookup, and lesbians don't really meet in bars anymore (lesbian bars are virtually non-existent in most cities nowadays). Instead they meet at private parties with close friends, featuring intimate conversations with friends.
While the sex can be hot and heavy, it generally develops slowly with flirting, which grows more intense as the two develop an initial relationship. Since this flirting among friends develops over a longer time, by the time they end up in bed, it burns more intensely due to the longer build up. Likewise, since women take longer reaching their happy endings, they take their time, building each other and trying to time their strides together (again, even if they don't become involved long-term, they see this as an ongoing relationship, as lesbians tend to have a core group of 'friends' they hang around with, rather than looking for the latest score.
Note: the above is based on some research I did for a book about a lesbian New York detective, so it's unlikely what you're looking for.
If you're aiming for the typical SOL crowd, you'll want a wham-bam-thank-you-ma'am presentation, where both women come to simultaneous orgasms—even though that's the exception, rather than the rule among lesbians.
Your best bet is to figure out your target audience, and then select a several readings which also target the same audience and see how they handled it. Since we're targeting ladies who love ladies, I'd focus on witty dialogue rather than flexing-the-biceps physicality.
You also need to define your characters. Are they both died-in-the-wool lesbians, experimental straights, someone looking for something 'different' or committed bi-sexuals (more likely to be focusing on an intense one-time encounter they can tease their male partners with). Then you'll want to build the situation to fit the characters, targeting their interests and motivations, letting the characters drive the story.
Seeing as you only want two paragraphs, you can probably ignore EVERYTHING I'd suggested, as you'll have little room for anything besides a brief summary of the action (girl A meets girl B, find X and Y in common, decide to hit it off because of Z, and then disappear behind a closed door for god-knows what).
Obviously, I'd invest the time in getting the scene right, rather than limiting it upfront. You can always cut later, but it's hard to add material not already present during an edit.
By the way, given my more detailed summary of lesbian dating behavior, you could mix the two and show them at a small party with mutual friends where they develop an interest in each other, and then finish it off quickly by having them 'disappear' together, rather than playing the full scene out. It'll still be longer than two short paragraphs, but it won't take quite as much development.
Or, you just go the traditional route, have them pull out the strap-on and have at it, throwing realism to the wind, as few SOL readers are focused on realism.
Whew! Didn't realize I'd gone on for so long. That's a lot of detail—even for me! ;D