Our first time swinging was also my first bi experience. We were out for dinner with a couple we were friends with. Didn't know they were swingers. After dinner they invited us to their "club" for some dancing and fun. Off we went. On the way the girls sat in back and in short order I noticed the conversation back there had stopped. I looked over my shoulder and the girls were frenching and I saw our friend had her hand up my wifes skirt. Now we hadn't ever even really talked about swinging but I knew my wife had a bisexual girlfriend a couple of years before we met. Looked like she'd been missing the female touch. When we got to the club we went in and registered as guests and received a tour. While registering Mary and I had a chance to talk and decided on the spot what ever went on here was OK with us as long as we stayed open about it. On the tour we were showed "private rooms"and "party rooms". We met our friends in the lounge area and had a couple of drinks and the girls went out to dance. This gave him and I a little time to chat. We talked about how long they'ld been swinging and what they liked/enjoyed. During this he never mentioned that he was bi though. The girls were enjoying each other on the dance floor with Eileen's lovely tits hanging out as she had her arms wrapped around Mary from behind and her skirt up around her hips while she played with her clit. I commented to Dave that if she didn't stop Mary was going to cum and squirt all over the floor. Too late Mary came hard and there was her love juice all over the floor! This earned a small round of applause from people watching. They came off the floor and had a drink. Mary just had this "glazed over"expression on her face and just sat there. Next thing you know though she grabs me by the crotch and says "lets go to the party room!" We got into the room and there were several couples in there. Dave and Eileen came in right behind us and Mary grabbed Eillen and said eat me now! and she pulled her to the mattresses. I slipped up to her head and Mary started sucking on me as Eillen fingered and licked her to orgasm after orgasm. Dave just kind of hung back and watched. I pulled out of mary's mouth and slipped behind Eileen to lick her pussy. Now from talking with Dave I knew Eilleen was a squirter too so I added a couple of fingers and begin to work them in and out of her pussy while I tounged her clit. I added one more finger into her ass and she exploded right then pushing my fingers out of her with the force of her orgasm. She flipped me onto my back then and started riding my face. I felt a mouth on my cock and would have sworn Mary was sucking me off. It felt great and then I felt a finger probing my ass. Now Mary's never been into doing that but I thought maybe she was feeling more adventerous. One finger gave way to the feeling of two and the fingers began working my prostate. I felt assgasm after assgasm rippling through me and Eileen kept orgasming shooting her juices down my throat. I felt my cum begginning to build and let loose a massive orgasm that was eagerly sucked down by whoever it was that was sucking my cock. Eilleen rolled off of me in time for me to see that it had been Dave who had sucked me off! I said, i thought you were Mary! He just looked to the side and pointed. I looked over and there's mary on her hands and knees with big cock in her pussy, one in her mough and another in each hand. She looked like she was having a grand time. Eileen said, why don't you return the favor? So Dave knelt by my head and I tentatively took a lick at his knob as Eillen started working on my still hard cock with her hand. She said, just close your eyes and do to him what felt so good to you then dropped her head down and swallowed me balls deep in one gulp. I toop the head of his cock into my mouth and ran my tound around tasting the salty pre-cum. I started slowly working more of his cock in and he began slowly pumping back and forth. Before long I had all of him in my mouth. I grabbed his balls in my hand and began playing with them and teasing his ass with my fingers which quickly slipped in. Before I knew it he blew his load deep in my throat and I swallowed it all. When I looked over Mary was still getting fucked but now she had a DP going on while she sucked one guy and a couple others were masturbating over her. Her big beautiful titties were covered in cum so I figured that this had been going on for a while. More to cum later